This whole Lincoln project constituency is just political insiders that live in DC, nobody else is changing their vote based on their endorsement. It's so weird that Democrats and the media keep chasing these assholes.
I think there's an underestimate of how a lot of Republicans don't like trump. They're not a part of his maga crowd but they're still dumb enough to think that voting for a Democrat is worse than voting for trump. The support and endorsement of all of these Republicans and the support of the Lincoln project is showing those people who are Republicans and have Republican beliefs that it is okay to vote for Kamala.