Sen. Al Franken (D-MN) will make an "announcement" on Thursday, per a statement from his office. On Wednesday, 12 of his Senate colleagues, including nine women, called for him to resign after a seventh woman came forward to accuse Franken of sexual misconduct. DNC Chairman Tom Perez also said that he believes that Franken should resign.
Franken issued a statement saying that this latest accuser was lying. The calls for his resignation came shortly after this statement.
More details about this "announcement" will be released in the future. It is widely speculated that Franken will resign.
Franken was elected to the Senate in 2008.