John Delaney (Nikki Kahn/The Washington Post)

Bartlett’s bid for an 11th term in office got more perilous last month, when Gov. Martin O’Malley signed into law a new congressional map that removed the conservative-leaning eastern portions of Bartlett’s 6th District and added a large slice of more liberal Montgomery County. The map was drawn by Democrats in Annapolis with the specific goal of unseating Bartlett and giving their party a 7-1 edge in the state congressional delegation.

State Sen. Robert Garagiola (D-Montgomery) launched a campaign for the the seat Nov. 1 and has the backing of some key figures in the party. Now Delaney, who lives in Potomac and serves as executive chairman of the Chevy Chase investment firm CapitalSource, is also forming an exploratory committee for the Democratic nomination.

“I’m not a professional politician,” Delaney said in a news release. “I’m convinced that if we stay focused on creating jobs, embrace ideas that put the middle class first, and involve the public and private sector to get things done, we can make a positive difference in people’s lives.”

Before starting CapitalSource, Delaney founded and ran HealthCare Financial Partners, a commercial lending firm. In addition to his longtime investment work, Delaney also recently founded Blueprint Maryland, a nonprofit group that aims to boost the state’s economy.

In addition to Delaney and Garagiola, a handful of other Democrats are also said to be considering the race, including former Montgomery County executive Douglas M. Duncan.