He can appoint not only Supreme Court vacancy but also many unfilled positions in the lower Federal Courts with not only pro second amendment justices but also NRA approved second amendment justices with a simple majority of the Senate. So even the lower circuits will be filled with staunch second amendment justices.
But, don't get your hopes up on legislation as we only gave him a razor thin edge in the Senate. Legislation, unlike the simple majority by the senate to confirm a Supreme Court or lower court justice, will take 60 votes to get any bill through and that means Democratic support for any legislation.
Don't hold your breath waiting for that support.
