Federal agents collared suspects in a slew of voter fraud cases Monday morning, chasing targets across California drawn from a list of more than 20,000 suspected noncitizens in the state who allegedly registered to vote in next month’s midterm election. Under the effort dubbed “Operation Protect the Vote,” law enforcement authorities sought more than two-dozen foreign nationals charged with fraudulently registering to vote in US elections, in which most of them allegedly cast illegal ballots. Homeland Security Investigations swooped on the Commerce home of Alexander Muñoz around 6 a.m. in one of the arrests. The agents pounded on the front...