"I've met him before, and he's good," Redlich said of Callaghan.
Callaghan could not be reached for comment, but in a press release e-mailed by his son, the former Saratoga County Treasurer said he respected McNulty.
"Congressman McNulty has been the very embodiment of integrity and selfless public service throughout his career," Callaghan said. "While I may disagree with the Congressman on certain matters of public policy, I have joined many of my colleagues in thanking Congressman McNulty for his years of faithful service."
Callaghan also indicated in the e-mail that he would make an official announcement shortly.
Despite the various candidates making a bid for McNulty's seat, Steck said he remains confident he is right for the job.
"If I got to Congress I think it would benefit this community," he said of Colonie. "I have worked my way up with a strong grassroots background."
The 21st District covers Albany, Schoharie, Schenectady and Montgomery counties, as well as parts of Fulton, Rensselaer and Saratoga counties. Steck's campaign website is www.philsteck.com, and Brooks' campaign website is www.traceybrooks.com.