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(CNN) —  

Former Maryland Gov. Martin O’Malley announced Tuesday he will not run for retiring Democratic Sen. Barbara Mikulski’s Senate seat.

O’Malley, a Democrat considering a presidential run, said in a statement Tuesday that he “will not be one” of the candidates for the Maryland Senate seat now up for grabs in 2016.

“I am hopeful and confident that very capable public servants with a desire to serve in the Senate will step up as candidates for this important office,” O’Malley said. “I will not be one of them.”

O’Malley also praised Mikulski for doing “an outstanding job representing Maryland in the U.S. Senate for nearly 30 years.”

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