'Forgive me for wondering if there isn't some anti-semitism on display here.'
I doubt it because Want2Be is Jewish.
'It's still about 50:50 for Trump, and Rubio's odds have considerably improved.'
I agree, it is not a walkover for Trump and the Establishment will pull every rabbit out of the hat to desperately try and stop him. Cruz is essentially finished because if he couldn't win South Carolina with its high evangelical contingent, he can't win anywhere. However, the Establishment will want him to remain in to draw votes from Trump on the real conservative side.
The Establishment are now all in for Rubio. Expect a lot more of their bought and paid for politicians to endorse Rubio. But expect the people to back Trump.
South Carolina is the gateway to the South. Trump leads the polls by far in Nevada, but it looks like things are possibly a bit dodgy in Nevada since it is a caucus.
Trump is the master showman, he will escalate his truth-telling and scare the Establishment out of its pants as the contest gets tougher. Trump will still be triumphant because it is too important to lose.
It is Trump vs the globalists. America vs the globalists and America cannot afford to lose.