So you think you should be able to waltz into any state on election day and vote? The laws of the that state say you can't, but you can vote in your own state so they must allow you to vote? There are all kinds of laws that require residency in a state for a particular length of time before certain rights apply. Do you believe the federal government has the authority to throw out all of these requirements?
“I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question. -Babbage (1864)”
You may enter any state and submit an absentee ballot for your voting district from wherever you are. You do not lose your right to vote outright just because you are not in your jurisdiction; you retain that right as regulated and standardized by federal law. There is no need for you to re-file voter paperwork subject to the non-resident location you’re in. (I imagine someday, when legislation catches up with technology, you’ll be able to walk into any polling station (or, heck, use your smartphone or some such) and cast a valid ballot which will be filed with your home jurisdiction. The exact local protocol may differ from one location to another, but the final outcome will be as though you voted at your current assigned location.)
Likewise, you shouldn’t lose your RKBA just because you haven’t filed paperwork in the jurisdiction you happen to be in outside of your normal residency. For most jurisdictions now, the only barrier to legal CCW is lack of “full faith and credit”, to wit you’ve gone thru the same process at home (background check, fee paid, ID card issued).
Better analogy is losing your right to drive just because you went to another state and don’t have a driver’s license issued there.
The federal government simply requires each state extend reciprocal courtesy to valid laws, acts, records and judicial proceedings in other states.
This is what would be done with RTC laws reciprocity. And its entirely within Congress’ constitutional power to compel states to extend such reciprocal courtesy to such state laws in effect in most of the country.
Moreover, it already exists for federal and state law enforcement officers. Every one else would also be covered by the proposed new legislation.