Senate Democrats are threatening to withhold their votes on a spending bill for the Pentagon unless Republicans agree to block President Trump from repurposing defense funds for his wall on the Mexican border, a tactic he’s employed in recent months. Democrats on Thursday will offer an amendment in committee to block Trump from reprogramming defense funds for his wall. “There will likely be some amendments offered, and my vote on final passage depends on the fate of those amendments,” said Sen. Dick Durban (Ill.), the top Democrat on the appropriations subcommittee on defense. While the bill could squeak through the...