Should Sen. Al Franken announce his resignation, Minnesota Gov. Mark Dayton is seriously considering appointing his second-in-command to take the spot, according to a new report.

Sources told ABC News that Lt. Gov. Tina Smith, a Democrat like her boss, is a top contender to replace Franken, at least temporarily.

A special election would follow for voters to pick someone to serve for the remainder of Franken's term, which ends in January 2021.

Franken is facing immense pressure from dozens of fellow Democratic senators to resign amid mounting allegations of sexual misconduct.

He revealed that he will be making an announcement Thursday but has denied a report that said he has already made up his mind to resign.