“I don’t know that Biden needs a message for ‘Never Trumpers’ — most ‘Never Trumpers’ are going to vote for Biden,” Miller said. But, he added, “I do think eventually the campaign should have a message for them.”

Mostly, “Never Trumpers” simply want Biden to run a general election campaign similar to his primary run, emphasizing more moderate policies and appealing to more centrist voters.

“I don’t want him to make crazy sacrifices to the left that he doesn’t need to make,” Miller said.

The extent to which “Never Trumpers” become card-carrying members of the Democratic Party might have broad implications for the party’s future. Are we seeing the birth of a new, ex-conservative faction in the Democratic Party or the resurgence of an existing one, with “Never Trump” conservatives joining with longtime Democratic moderates? Could that wing of the party become as strong as it was in the 1990s? The 2018 general elections and the 2020 primaries suggest more centrist Democratic candidates are winning among white, college-educated voters in the suburbs against both Trump Republicans but also Sanders Democrats. That’s an opportunity for Democrats to expand their coalition — after all, white voters are the majority of American voters. It’s also likely to be a challenge: The more liberal bloc of the Democratic Party increasingly favors big, transformative policies on economic issues that longtime moderate Democrats and ex-Republicans are unlikely to ever embrace.