Earlier quoted context omitted.
Immigrants can't vote. Only citizens can vote.
Certainly not legally (until they become citizens), but their children can when they turn 18, and said immigration has been happening for many decades.
And some of the most rabid Trump supporters are recent immigrants (cf the Epoch Times' role in the last years, or the fact that one of the arrested Capitol rioters, Yevgenya Malimon, mother of an Oregon Republican party official, needed a Russian interpreter at her arraignment).
Think of other right wing voices in the US: Peter Thiel (first generation immigrant), Ron Unz (second generation), Roosh V (second generation).
Meanwhile, one of the key demographics for Biden's win in Arizona was high turnout among — Native Americans, the Final Boss of non-immigrants.