Using constituent data from Techpolitics and updating the membership for the 111th Congress, here are some demographic comparisons between the constituents of the Blue Dogs and the constituents of the Progressive Caucus:
Blue Dog vs. Progressive, Constituent Demographics
Demographic
Blue Dogs
Progressives
Other Dems
Median Income
$37,798
$41,405
$44,890
% in Poverty
14.02%
16.03%
12.13%
African-American
11.63%
22.35%
12.09%
Hispanic
10.41%
18.28%
14.62%
Other non-white
3.76%
7.04%
5.96%
It is worth noting that both Progressives and Blue Dogs have constituents who are, on average, poorer than the rest of the House Democratic caucus. How is it then that these two groups are on the opposite end of the Democratic Party?
One tempting conclusion is the substantial ethnic difference between the two constituencies. 47.67% of the constituents of Progressive Caucus members are non-white, while only 25.08% of the constituents of Blue Dog House members are non-white. It isn't that the Blue Dogs have wealthier constituents, just that they seem to have whiter constituents. Somehow, in and of itself, that is enough for Blue Dogs to take a more corporate, conservative policy line.
These numbers are pretty disturbing. They remind me of the old saying: "the rich man keeps blacks and whites apart so he can steal from them both." Seems about right.