In Political 4/16, "Pennsylvania GOP Could be Crucial in Whip Race" by Jake Sherman and John Bresnahan , we find this paragraph:
The Keystone State’s 13 lawmakers are meeting Tuesday at 5 p.m. to hear from Roskam, Scalise and Stutzman. The state’s lawmakers are discussing voting as a bloc, and want to hash out who they might support. It’s a tough state to read, as Republicans represent the moderate suburbs of Philadelphia and deep red pockets in the western and middle part of the state. If Pennsylvania sticks together and votes for one candidate, it could easily sway the race in that person’s direction.