Are Republicans using the border crisis to lay the groundwork for rejecting results if Biden wins?

[Ferguson97]

I know that Republicans have made immigration an election issue in the past (remember the infamous 2018 "caravans"?), but I just can't help but shake this feeling that they're laying the groundwork to reject the results of the 2024 election, in the event of a Biden victory, by alleging that millions of illegal immigrants voted for him. I know that Republicans have always alleged that illegal immigrants and dead people and people from out-of-state are consistently voting for Democrats but given the extent to which they have rejected the 2020 election results on the basis of mail-in voting conspiracies and the like, I think that this is the natural conclusion based on how they're focusing their political agenda ahead of November.