"Chain reaction" item in the TU:

If state Sen. Neil Breslin decides to seek McNulty's seat, it would open his Senate spot. Fellow Democrats are standing in line.

Albany County Democratic legislator Phil Steck of Loudonville, the Colonie party chairman

Albany County Democratic legislator Gary Domalewicz of Albany

Charlie Diamond of Watervliet, who runs McNulty's district offices and has been with the Green Island congressman during his 10 terms

Update: Also looking at Breslin's state Sentate spot, via the TU:

David Weiss, president of New York Farmer’s Wind Power LLC

And from that same item, an additional name for the 21st CD:

Albany Common Council President Shawn Morris