> The only way to ensure Trump's demise is to vote him out of office, and democrats are going to have to do it with one hand behind their backs

Democrats are tying their own hands behind their backs. Recall that the core Trump voters - the white working class - were Democrats for decades, until the Democrats started neglecting them. If the party quit treating these people as deplorables and racists, and tried to address or at least speak to their concerns, they would win a lot of them back. And if the party quit giving religious people a reason to fear the Democratic party, and shut up about taxing churches and seizing guns, they'd get a lot more voters too, or at least these voters would have a reason to not show up and vote for Trump.