Greg Nash Senate Majority Leader Mitch McConnell (R-Ky.) on Thursday cut the legs out from a bipartisan effort to keep suspected terrorists from buying guns. In doing so, McConnell, a master of the Senate’s arcane rules, provided cover for vulnerable Republicans who wanted to be seen as supporting the effort, but did not want to cross the National Rifle Association. “The scenario that Sen. McConnell set up was textbook McConnell,” said Brian Darling, a former Senate Republican aide. McConnell had promised a vote this week to Sen. Susan Collins (R-Maine) on her bipartisan measure barring people on two key...