The GOP never Trumpers are having another tantrum and have green lighted people to withdraw their support for Trump. That makes polls useless for a bit, IMO. If they get back on side Trump will be fine.
I think the polls this time around will be misleading right to the end. There will be no "adjust for credibility" phase close to the election.
-- The GOP never Trumpers are having another tantrum and have green lighted people to withdraw their support for Trump. --
It makes sense for the party elites to prosecute a surge in their war against the anti-globalist voters, before the election.