The president swears an oath to preserve, protect, and defend the Constitution of the United States. That makes the "one issue" the United States Constitution - "the supreme law of the land." That Constitution includes an amendment protecting our "liberty teeth" - the 2nd Amendment. But perhaps you can tell us "how [our RKBA will] be reclaimed under" any Republican president who ignores the Constitution he swore to preserve, protect, and defend? Is it magic? Something that automatically happens when a Republican is elected? "The world wonders"...
;>)
Once again, how will our RKBA be reclaimed under a liberal President?
That said, which branch of government is responsible for writing laws under the Constitution (one hint - each them also take a similar oath to uphold the Constitution).
I'm not willing to help the left whittle more of my 2nd amendment rights away by putting someone who would take over with a chainsaw in charge of the agencies responsible for implementing laws written by Congress.