A liberal advocacy group is broadening its legal effort to disqualify Republican lawmakers from running for reelection because of their support of the events surrounding the Jan. 6 attack on the U.S. Capitol. Free Speech For People filed lawsuits on behalf of voters in Arizona’s Maricopa County that challenge the eligibility for the office of GOP Reps. Paul Gosar and Andy Biggs, and state Rep. Mark Finchem. Mr. Gosar and Mr. Biggs are running for reelection in November. Mr. Finchem is running for secretary of state with former President Donald Trump’s endorsement. The suits say the lawmakers should be...