If not, I suggest states pass such legislation now.
And if they violate that oath by preventing witnesses from testifying at the Impeachment trial...
senate.gov/artandhistory/…

twitter.com/i/moments/8877…
Especially in states with recently elected Democratic governors who will sign any bills into law necessary to prevent kompromat-induced treason.

but Treason is punishable by death.
And one thing that came out of the DNC suit: Russia stated what they did in 2015-2016 were acts of war.
So, yeah. We're going there.