They're throwing House GOP Leader Eric Cantor under the bus. Specifically, they're sending him a signal -- that if the US defaults because the House fails to pass something that can pass both the Senate and the president's desk -- Cantor will have been pre-thrown under the bus.
Because if the US does default, the false-equivalence media will try to put some of the blame on Democrats. And Sens. Corker and Graham have just handed the Democrats the ammunition to say, "Don't blame us; even Republican senators put the blame for this on their own party."
Corker and Graham are telling Cantor, fall in line. Or carry the blame yourself.
Follow Senior Producer Jonathan Larsen (@jtlarsen) on Twitter