Al Franken

Updated at 7:51 p.m. ET

Sen. Al Franken, D-Minn., plans to announce his resignation on Thursday, a Democratic official tells Minnesota Public Radio. The official spoke to Franken and key aides, MPR News reports.

Franken's office, however, says that "no final decision has been made."

Updated at 4:05 p.m. ET

Another prominent public figure has been accused of making unwanted sexual advances. Los Angeles radio host Leeann Tweeden said now-Sen. Al Franken, D-Minn., forced himself on her and groped her while the two were on a USO tour in 2006.