New York Attorney General Andrew Cuomo will announce in March that he will pose a primary challenge to Gov. David Paterson (D-N.Y.), according to a New York Daily News report. 

Cuomo's bid has been expected for some time. Paterson has suffered in the polls and Cuomo is the popular son of a former governor, Mario Cuomo.

Here is more from the Daily News:

Cuomo spokesman Richard Bamberger declined comment, but a source close to Cuomo told The News, "He will make an announcement at the end of March. And what he will say is that he intends to run for governor. ... He thinks there are a lot of problems in the state and he thinks he can help solve them."

That source is not alone. On Wednesday, a day after Republican Scott Brown won Ted Kennedy's Senate seat in Massachusetts, Stuart Applebaum of the Retail, Wholesale and Department Store Workers Union urged Cuomo to run, saying Paterson "is not the strongest candidate."

Upstate party chief Larry Bulman went further, saying, "Let's not run a third-string quarterback if there is a first-string quarterback in the game. We should be talking to Andrew Cuomo."