Assuming it's correct that Biden won the military vote
Trumps disdain for said people combined with the GOPs fulsome (and people are saying possibly sexual) embrace of everything about the rotund tangerine lump of clag and his klan, can, if weaponised correctly, be an electoral millstone for a long, long time.
If Im on a campaign and looking for something to attack a senator or congressperson on, it is perhaps as potent an attack as any. Even if the individual in person didnt explicitly endorse his behaviour pre and post election, it is fair game and something that will resonate all the more loudly when Trump himself is not around to drown it out from the White House.
If Democrats are bold enough to make this their go-to line of attack for ANYONE bearing the sign of the elephant, it can - like the cry of socialism! from the right - be made to stick, and while deprogramming the cult of Trump will take time, the Republican Party becoming the explicitly anti-veteran party could hurt them up and down tickets for an indefinite period of time.