WASHINGTON -- If U.S. Sen. Lindsey Graham wants to know why his foreign aid bill has stalled in the Senate, he need only look in the direction of the junior senator from South Carolina. In an extraordinary clash between Republican senators from the same state, U.S. Sen. Jim DeMint forced Senate Majority Leader Harry Reid to postpone consideration this week of a $53.3 billion foreign aid bill, backed by Graham. DeMint demanded the bill be debated by itself and not combined with other spending measures. “I respect and work well with Lindsey, and I share his goal to secure our...