The NYT reports this morning that Barack Obama, like many presidents before him, is now seeking line-item veto authority. President Obama, in his latest effort to signal fiscal responsibility against the rising debt, plans this month to ask Congress to give him and future presidents greater power to try to delete individual items from spending bills. In doing so, Mr. Obama will join a long line of his predecessors who have sought either line-item veto power or, after the Supreme Court in 1998 ruled such a veto unconstitutional, some other rescission authority that passes muster. Congress once again is unlikely...