(CNN) - Debbie Dingell, longtime Democratic activist and wife of veteran Rep. John Dingell, is seriously considering a run for the Senate seat that will be vacated by retiring Sen. Carl Levin of Michigan next year, a knowledgeable source told CNN.
A Democratic National Committeewoman, Dingell has been approached by multiple people in Michigan and Washington about a potential bid.
Dingell has long been involved in Wolverine State politics. She worked alongside Levin in 2008 to get the Democratic primary moved up to an earlier slot in the primary calendar so the state could have more of an influence on the nomination process.
In addition to her 30-year career at General Motors as a senior executive, Dingell has served on multiple boards of charities and organizations and has chaired several political campaigns, including former Vice President Al Gore's presidential campaign in Michigan.
Her husband, 86, is the longest-serving congressman in history, with 57 years on Capitol Hill. He represents Michigan's 12th district.
Another Democrat, Rep. Gary Peters, is weighing a bid, as well. His district includes parts of Detroit. The three-term congressman told the Detroit Free Press editorial board on Friday that he was "seriously considering" a Senate campaign.
On the Republican side, sources say Scott Romney, the older brother of Mitt Romney, is interested in the seat. The Romneys' father, the late George Romney, served as Michigan governor during the 1960s.
Saul Anuzis, a former Republican National Committeeman and former chairman of the Michigan Republican Party, is also being encouraged to run, he told CNN.
Levin, 78, announced Thursday he would not be seeking re-election in 2014.