Flurry of Lawsuits Shows Both Parties Preparing for Post-Election Challenges

Republicans are using the courts to hunt for noncitizen voters. Democrats worry the G.O.P. is trying make it harder for eligible voters to cast ballots — and paving the way to try to toss valid election results.A voter casting a ballot at Miller Elementary School in Dearborn, Mich., during the state’s primary in August. Scores of lawsuits from the two major political parties and their allies reveal the likely battle lines for post-election challenges.