Probably the same that it would take to convince you that Obama had similar offenses, and was treated differently (more respectfully) than the Dems are treating Trump. Obama was just sneakier about it. Trump is blunt.
You admit that, I'll acquiesce to what you propose.
So you are claiming that Obama is just as guilty of the same crimes despite not a shred of real evidence that he committed any of these crimes? Before you claim that Biden pressuring the Ukrainians in 2014 was the same thing, there are some very critical factual differences that make what Biden did legal and what Trump did illegal.
What Biden did was pressure a foreign power to advance the foreign policies of the United States. He did not benefit personally and in fact he was putting his son at potential risk because the prosecutor he was trying to get fired was not investigating Burisma. A later prosecutor did investigate Burisma and found a number of tax law violations on the part of the company and the CEO, but no link whatsoever to Hunter Biden in large part because he had nothing to do with Burisma's finances. The company is currently under investigation for contract law violations from before the time Hunter Biden had anything to do with the company.
What Donald Trump did was put pressure on the Ukraine to give him something of personal value ie gin up a fake investigation of Hunter and Joe Biden to help him in the 2020 election.
Nobody employed by the United States government is to get any compensation for doing their job beyond their paycheck and government benefits. To receive any other form of compensation in return for doing an official act of your office is bribery. The law also makes it clear to make any attempt to get any form of compensation is also bribery.
Fox News and the conservative media has been working overtime to make the two seem equivalent, but they are not.
Now were some of Obama's policies questionable? Possibly. Obama conducted a raid in Pakistan without the government's permission, did drone strikes in that country, as well as many more drone strikes than Bush. However, the drone strike capability expanded dramatically in the last months of the Bush administration, so if it had been online earlier, Bush may have used drones just as prolifically.
There is not the slightest shred of evidence that Obama did anything illegal in office to benefit himself personally. There are those who are 100% convinced it's there, but claiming there is with no evidence is the weakest form of "what aboutism".
I'm not saying it could not happen, but having known more than one person in the DC circle directly or indirectly, even the high-profile people like Bolton rarely write their own books. They sit down with a ghost writer that takes notes, and that person writes a first draft. Then multiple revisions ensue.
Ghostwritten political memoirs are common. Hillary Clinton has used ghostwriters for most of her books. Though her daughter did most of the writing in the most recent book on notable women of history. They are credited as co-authors.
Bill Clinton hand wrote his entire memoir on legal pads and all evidence shows Obama wrote his own books himself. As far as I can tell Bolton does all his own writing.
I would not put it above the Dems as this being a perfectly well-timed, completely false "leak" with the goal of trying to force the hand of moderate Republican Senators to get them to reconsider their votes on the introduction of new "evidence" in the Senate Trial. It's classic DC politics.
Quite a bit of the stuff coming out now is coming from former Trump associates and lifelong Republicans. John Bolton is one of the strongest warhawks in the Republican party and has been a faithful GOP hack his entire life. However he has been very concerned about Trump running US foreign policy.
Lev Parnas is doing a steady drip, drip of damning evidence. He has all this evidence because he was one of the deepest insiders in Trump's orbit for years.
There is old fashioned politics going on in Washington right now, but there is also unprecedented levels of corruption at the highest levels and reams of evidence to support it. The Republicans in the Senate are dead set to whitewash the entire thing, but the only politics involved on the part of the Democrats is to make the Republicans pay the maximum price for putting party before country. As they should. Any politician who will give a pass to a fellow party member for selling out the United States deserves to be fired by the voters and I would say the exact same thing for any Democrat who put party first in this sort of situation.
Remember Russiagate? 30+ million dollar investigation and the Dems had "incontrovertible proof" that Trump colluded with Russia (which they didn't have - Schiff flat out lied, repeatedly, on that) . . . The odds are high that 1) this is just made up (not uncommon for the NYT with regards to their coverage of Trump - it's completely speculative with zero proof put out there, and was released at EXACTLY the right time to try to shake up the trial in the Senate), or 2) that the ghost writer is a Democrat that is out to hurt Trump - a la the CIA "whistleblower" which we pretty much know is a registered Dem with VERY close ties to Joe Biden. Or (less likely) is 3) that this is actually true. If Bolton would have wanted to hurt Trump, he would not have fought the subpoena from the House so hard, and he did and wound up not testifying.
There is a possibility that the Mueller investigation in the end will turn a profit. They seized a lot of property in their investigation.
But that aside, there is no crime in the US Code called "collusion". The crime is "conspiracy against the United States". Of that Mueller found lots. Michael Flynn was initially charged with conspiracy and he plead down to 1 count of making false statements. Paul Manfort was convicted of conspiracy and rick Gates plead to it
Mueller found lot of evidence of conspiracy against the United States. But Mueller also does not charge anyone unless he's 99.9% sure of a conviction. Because of the 1973 DOJ memo, he couldn't indict Trump. In the Roger Stone trial his team made is blatantly clear that Roger Stone and Donald Trump were working together on a conspiracy against the US, but he couldn't indict Trump so he had to speak indirectly and refer to Trump as "the candidate".
The conservative media likes to play down the Mueller investigation, but it turned up plenty of evidence of conspiracy. Seth Abramson wrote a book called Proof of Conspiracy. I recommend it if you want to know the true story and not one pre-digested by conservative media with an agenda. It's a very lawyerly book, but he lays out the case in meticulous detail.
Mueller would not say in his Congressional testimony anything about Trump's guilt because he is obligated by the rules of ethics lawyers need to follow not to. If a prosecutor is not charging someone with a crime, they cannot ethically accuse that person of any crime, even informally. If you know lawyer speak, of which I am not fluent, but I can pick up some (my SO is fully fluent), Mueller was indirectly saying that he had Trump on crimes, but since he is not allowed to indict, he can't directly say anything.
I don't believe that Mueller would indict Trump on conspiracy with Russia in the 2016 election because, despite some evidence that he might have, there is not enough evidence rising to the 99.9% certainty level that Trump himself was directly involved in the conspiracy. The fact that the conspiracy existed has been proven in court. Trump just stayed one step into the plausible deniability side. Many of his closest associates crossed that line and got nailed for it.
The conservative media has been on a campaign for 30 years to convince those who will listen to their message that Republicans are saintly and Democrats are the epitome of evil. But there is a secondary line of attack too: convince those who aren't willing to believe that first argument that both sides are equally corrupt and that any attempts to bring anyone involved in Republican corruption to justice are just playing political games.
I dig into the real facts and look past the spin. There really is a difference between the two parties. The Democratic party is far from perfect and I don't agree with all their policies, but the Republican party has been growing more and more corrupt and forgetting how to govern for the last 25 years. The Trump administration is the stage 4 of this cancer.
There is only one party left who gives any whiff of concern for the health of the country.