The most Democrat part of the CD is Columbia county; the Democrat-voting parts of Rensselaer are in the 21st district. Elsewhere, Saratoga Springs has a large Democrat vote but is usually outvoted by the rest of Saratoga county, the north of Dutchess county has quite a few Democrats and while the part of Otsego in the district is mostly Republican it's not without Democrats either. But this is a district that is "supposed" to be held by a Republican. And was obviously drawn for that purpose.
Thank you
Never really thought of Saratoga as a Democratic area, would have picked the immediate suburbs of Albany if I had to guess. Hopefully a GOP candidate can take it back in 2010