It is true that most Democrats say they'd never vote for a Republican in a thousand years. But they will find it easy to vote for Trump because the Republican establishment hates him. They will not feel like they are being traitors by voting for Trump, they will be able to say they poked a finger in the eye of the Republican Party, and they will help put Trump in office so that he can help make American great again.
Those same Democrats and Independents are going to put the House and Senate back in Democrat hands but that’s alright because The Donald says he can deal with Chuck Schumer.