The Pew Research Center article and map are linked below.
Pew Research Center: The House Republicans Behind the Government Shutdown
"Just over half (41) of the signers are from the South; 22 are from the Midwest, and 13 are from the West; the only members from the Northeast are four representatives from rural parts of Pennsylvania."
---Drew Desilver, Pew Research Center
The New Yorker: The "Suicide Caucus" in the GOP