You're right, regardless of what Biden or Kamala do, the right are gonna say they're soft and are undermining US dominance, just like with Obama. I don't know if foreign interference will be the "angle" this time around or not. Far-right online message boards are making nebulous "commies" out to be the enemy, which can mean almost anyone or anything, but I don't know if that's indicative of the GOP as a whole. It's also possible that there will be a larger bipartisan push for China as the national enemy rather than it being fodder for dem-v-gop mudslinging.