Steck has already been on the campaign trail.
"I filed the required paperwork. I'm declared. I think we need to focus on real change in Washington," Steck said. "I think the Democrats in Congress have failed to stand up to President George Bush."
In his favor, Steck cited his role in defeating what he described as one of the "strongest, most entrenched and well-funded [Republican] parties in the state" as Colonie's Democratic chairman.
Colonie Democrats won a majority in town hall for the first time since the 1930s last November.
"My accomplishments on the local level are well documented," said Steck. "I'm known as one of the hardest working people in politics."
Steck said he is a big fan of McNulty and added that the congressman has been very supportive of Colonie. Although Steck has made his intentions known to McNulty, he said the 21st Congressional representative has not made an endorsement.
"Mike has told me, as he has told the press, that he will not make an endorsement at this time," said Steck.
The Colonie Democrat said he is confident that Democrats will keep the congressional seat.
"The largest municipality in this congressional district is Colonie," Steck said. "If you're a Republican, you have to do well in Colonie, and I feel comfortable having my base here in Colonie."
Some Republicans don't see it this way.
Councilman Redlich of Guilderland said he will not run again for the seat, but he doesn't count his party out of the race.
"There's a perception that a Republican can't win," Redlich said. "The Republican Party can definitely win with the right candidate."
Redlich said former Republican Gov. George Pataki "overwhelmingly" won the 21st District in 2002. Redlich unsuccessfully challenged McNulty in 2004 and 2006.
Saying he couldn't run again because of a hectic work schedule, family obligations, and newly elected town board seat that requires more hours than he anticipated, Redlich pointed to fellow Republican Chris Callaghan of Waterford.