Bulwark founder Sarah Longwell hosts weekly surveys with President Donald Trump supporters. And this week’s inquiry reveals a sea change that’s going to irreparably clobber Trump and the Republican Party in the next few months.“We've done a series of focus groups in recent months with a bunch of Zoomers who identify as politically moderate,” said Longwell. “… With the ones that had voted for Trump, we saw a lot of evidence that the large gap bet…