So, I guess they'll just have to revert to something Constitutional, like the 2nd Ammendment.
Or they could obey the Constitution, which says senators serve a term of six years unless expelled by the Senate itself.
The 2nd Amendment gives the people no right to use arms against the government. Such use is by definition unconstitutional, revolutionary and illegal.
Doing so is sometimes necessary, but it cannot be legal, as its purpose is to take needed (or unneeded) measures outside the form of law. The Constitution recognizes the right of the people to keep this ultimate power in reserve, but using it by definition would involve overthrowing the Constitution.