Certainly there are some Democrats who really do support Trump. However, there are many that are crossing over in the open primaries to vote for him because they think he can easily be defeated in the general election.
You have zero proof of that. What makes you think Cruz would do better? Polls mean nada, zilch, zero, nothing.
Prove it. That is not a fact and you know it.
I live in Western PA, belong to clubs, play golf with and go to Church with, and live beside many union Demonrats that have NEVER voted for a single Republican in their entire lives.
So many have said out loud in front of their demonRAT union pals, that they will vote for Trump over hildabitch, BUT, if it's not Trump, they will go with the bitch.
It's not logical, but I believe them. They are pissed about open borders and losing jobs, both over seas and to illegal immigrants.
Do not discount at how pissed working people, black, white, yellow and brown are about illegal immigration and job loss. NO WORKING PERSON believes that unemployment is 4.8% and most people still want good jobs, not flippen burgers, but making stuff in plants and factories.
They, rightly or wrongly, believe that Trump will be the best at bringing jobs back.
Bull. If the left thought Trump would be dispatched so easily in the general election, they'd be paving the way for his nomination, not trying to destroy him during the primaries. The reason why there is an all-out assault on Trump right now is because the establishment on both sides of the aisle are terrified that he might actually win this thing.
Nobody is worried about Cruz. He'll get crushed like Goldwater. Rubio and Kasich are going nowhere. Sanders? The Democratic machine has Superdelegates to keep him at bay (half the reason you're seeing pissed-off Dems crossing over).
Trump is the guy everyone is afraid of.
This would not be the first time this has happened, and that is factual and absolutely no reason to trust the dems.