Voters fill out their ballots for the presidential primary in a log cabin run by the American Legion in San Anselmo, Calif., on Super Tuesday, March 3, 2020. While no significant foreign interference was detected, election and law enforcement officials are closely monitoring this year’s primaries.

Voters fill out their ballots for the presidential primary in a log cabin run by the American Legion in San Anselmo, Calif., on Super Tuesday, March 3, 2020. While no significant foreign interference was detected, election and law enforcement officials are closely monitoring this year’s primaries.