Team Trump has learned a lesson about how to steal an election: try to fix it early, not wait until the votes are cast.
Trump-supporting Republicans have filed hundreds of lawsuits challenging voters or voting procedures targeted at Democratic constituencies. Four years ago their actions, rejected, were post-election, culminating in the violent insurrection at the U.S. Capitol on January 6.
The legal suits they're filing now -- relevant if Trump loses the election --seek to disenfranchise voters or set the predicate to contest the results in friendlier courts at the state and federal levels.
There is action in multiple states, all the battleground ones, but the greatest focus is on Georgia, North Carolina and Pennsylvania. If either candidate loses these three, it'd be virtually impossible to get the 270 electoral votes to win.