Massachusetts Attorney General Martha Coakley. (Gretchen Ertl/Associated Press)

Massachusetts Attorney General Martha Coakley (D) is considered a likely special election candidate should Sen. John Kerry's (D) seat become vacant if he is named U.S. secretary of state. But the Boston Herald reports that Coakley is more interested in the governor's mansion than the Senate.

There are no term limits in Massachusetts, but Gov. Deval Patrick (D) is not planning to run again.  

While she was widely blamed for losing a Democratic seat to Sen. Scott Brown (R) in 2010, Coakley has spent the past two years rebuilding her reputation and is one of the most popular politicians in the Bay State. In a poll taken in early February,  43 percent of likely Democratic voters called her a strong candidate for governor in 2014. No other potential contender came close. 

Massachusetts Lt. Gov. Timothy Murray (D), state Treasurer Steven Grossman (D) and former gubernatorial candidate Charlie Baker (R) are all eyeing Patrick's seat as well.