Nah, no Senate ratification needed. This is The Won we're talking about here! He can bind the US just by sheer force of will, that old obsolete parchment by all the dead white male slave-owners be damned!
(See the way everyone's talking about Trump "withdrawing" from the Paris "climate" treaty if you don't believe me)
I expect Chuckie Schumer to get up in front of the TV cameras and say that the Republican leadership failed to pass "common sense gun control."
"If it saves just one child's life, isn't it worth it?"