Readers have to get halfway into the Associated Press report on its new AP-GFK poll to find this out, but Barack Obama’s job approval numbers have cratered in the shutdown. His overall job approval is now 37/53, and a majority want Obama to start cooperating more with Republicans, as 63% want Republicans to meet Obama part-way, too:Americans are holding Republicans primarily responsible for the partial government shutdown as public esteem sinks for all players in the impasse, President Barack Obama among them, according to a new poll. It’s a struggle with no heroes. … Most Americans disapprove of the way...