The Senate appears poised to pass a resolution to restrict President Trump's military authority on Iran, following a similar vote from the House last week. Sen. Tim Kaine (D-Va.), who introduced the resolution, said Tuesday he has the 51 votes necessary to get it passed. Sens. Susan Collins (R-Maine) joined three of her GOP colleagues — Sens. Todd Young (R-Ind.), Mike Lee (R-Utah), and Rand Paul (R-Ky.) — in announcing she would back Kaine's bill. The resolution came about after Trump approved an airstrike in Iraq earlier this month that killed Iranian Maj. Gen. Qassem Soleimani and heightened already-simmering tensions between Tehran and Washington. "This should be the hardest decision we make," Kaine said. "We shouldn't do it unless we have the guts to have the debate."

Scroll for 5 things you
need to know now