Dix resigned Monday as Senate majority leader and as a state senator after a video posted on the political blog Iowa Starting Line showed him kissing a lobbyist.
Bill Dix, 55, was allegedly recorded kissing the lobbyist at a bar in Des Moines on March 1.
A married Republican senate leader has stepped down after video emerged showing him making out with a woman in a bar.
A self-described "family values" conservative has resigned from the Iowa state legislature after he was caught on video kissing a lobbyist who is not his wife.
A statement from Iowa Senate President Jack Whitver (R) said Dix's resignation was effective at 2 p.m.
"Iowans hold their elected officials to a high standard".
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Republican senators say they were shocked by the abrupt resignation of the top Republican in the Iowa Senate.
Sen. Rick Bertrand, R-Sioux City, who attended the meeting, said Dix "did the right thing for himself, for his family and for Iowans today and I think as a caucus we'll move forward".
The woman was identified as a statehouse lobbyist for Iowa League of Cities, an organization that seeks to sway legislation at the state Capitol.
Senate Democratic Leader Janet Petersen of Des Moines issued a statement calling the video "a serious matter" that follows Dix's failure to take responsibility for the $1.75 million settlement that resulted from a sexual harassment brought by former Senate Republican staffer Kirsten Anderson.
One of the clients she represents, the Iowa League of Cities, issued a brief statement: "We are taking what we believe are appropriate actions, but because this is a personnel matter we can not comment further". Schneider says despite the leadership upheaval, senate committees will meet and the senate will debate, when necessary this week. His biography had been deleted from the Iowa Senate Republicans website by Monday afternoon.
Dix previously fielded calls for resignation following a lawsuit filed by a former caucus communications director over how sexual harassment complaints were handled. An internal report later revealed senators made "sexually suggestive comments" or discussed "sexual preferences" on the chamber floor in recent years, and staff members in the Republican Senate office were unlikely to report misconduct because of fear of retaliation.