Ron Brownstein's latest National Journal opus is illustrated here. Below, the Republican and Democratic districts with the highest number of uninsured Americans. It jumps out at you: a lot of these districts are in Texas, and a lot are represented by Democrats who oppose the public option and who might vote against health insurance reform.
"....the McCain Democrats are as likely as the Obama Democrats
to represent districts where the proportion of people without
insurance exceeds the national average. The share of the
uninsured is greater than the national average in 21 of the 49
McCain-Democrat districts, or just under 43 percent. The proportion
is about the same in the Obama-carried Democratic districts--
90 of 208, just over 43 percent.