So, it's the local and state governments at fault when it's the Democrats but the RNC when it's the Republicans?
Bernie was favored to win Texas.
Bernie Sanders leads in Texas, a pivotal Super Tuesday primary, NBC/Marist poll says
Bernie Sanders ahead of Joe Biden in Texas, new poll shows
The time between the South Carolina and Texas primaries was only 4 days. Most of the polls that came out on March 2 were in the field before the South Carolina primary. The Emerson college poll was in the field Feb 29 (the day of the SC primary) to March 1. That says about half the respondents were not aware of the SC primary result when they answered the poll. A Swayable poll that was in the field Mar 1 and 2 had a point lead for Sanders, but also had 5% for Buttigieg and 3% for Klobachar. They dropped out on the eve of the Texas primary and most of that vote went to Biden. The Data for Progress poll from March 3 was in the field Feb 27-Mar 2, but Biden had a 2 poin advantage in that poll.
Michigan happened in a more stable polling environment as the shocks in the days before Super Tuesday had settled into the minds of voters in subsequent primaries. The highest rated pollster (Monmouth A+) on the eve of the Michigan primary had Biden up by 15 and he finished at 16.5, within the margin of error.
Bernie is under performing his 2016 performance. That's a fact. There are many possible reasons for this:
1) The DNC/Democrats/somebody are cheating or changing the results
2) Some percentage of the 2016 Bernie vote was anti-Hillary and not pro-Bernie
3) This is a different time and the voters have different priorities from 2016
4) Biden really is more popular
5) Everything is being faked be a deep state plot that is hacking all the vote tabulation
Personally I think #5 is getting into the tin foil hat crowd led by Alex Jones. And I think the most likely reasons are #2 and #3.
The fact of the matter is there is more support for the moderate candidates this election cycle. When there were 6 of them competing for the moderate lane and only one or two in the more liberal lane, the moderates balkanized each other. Now that the race has been pared down to one moderate and one liberal, the moderate voters are rallying around the one moderate candidate and he's winning.
As I've said before, the Democratic party is not as liberal as the Twitter Democrats think it is. It's moving a bit to the left every year, but the bulk of the party is still fairly moderate. The younger generations are more liberal which means the party will liberalize over time, but right now the bulk of voters are over 40 and they are not super liberal, as a group (though there are always individuals in any group who are out on the end of the bell curve).
The US population is also very freaked out right now and it's getting worse. I had to do the regular grocery shopping the other day and it was madness. They announced over the PA they just got in some hand sanitizer and they sold out in about a minute. The toilet paper aisle was empty and at checkout they said they completely restocked that aisle an hour and a half before. The checker was tracking sales for the day and said it was a record day for sales.
Traditionally people have run to strong man Republicans when things look scary, but it's the strong man Republican's incompetence that is part of the reason they need so much toilet paper. Biden is the calm, rational voice that people feel gets it and gets them. One comment about tonight's debate between Biden and Bernie was Biden showed that he likes and cares about people, Bernie comes across as liking humanity, but not really liking people much.
A big element of leadership in a crisis involves assuring those affected that things are going to be alright and to demonstrate competency in actually getting things done. Trump is falling flat on his face in both areas. Bernie would probably do OK in the latter, but he doesn't have the "bed side manner" to make people feel like there is a light at the end of the tunnel. Biden can do both.