New Hampshire Gov. Maggie Hassan will be the main speaker at the Maryland Democratic Party's annual gala May 21 in Upper Marlboro, Gov. Martin O'Malley announced Friday.

Hassan, the nation's only Democratic female governor, was elected in 2012 with the help of O'Malley when he served as chairman of the Democratic Governor's Association. 

O'Malley, who is expected to be a frequent visitor to New Hampshire over the next two years as he looks toward a likely presidential run, issued a statement praising Hassan's record in office.

"Over the course of the last year and a half, Governor Hassan has strengthened public safety, increased funding for mental health, passed a fiscally responsible budget, made college education more affordable for more people, and brought people together to grow jobs," O'Malley said.