[Verginius Rufus]

Actually, the Constitution forbids us from questioning Ellison about what he said in Congress, so he can lie all he wants.

See Article I, Section 6 (about Senators and Representatives):

"...and for any Speech or Debate in either House, they shall not be questioned in any other Place."

[Tupelo]

“so he can lie all he wants.”

Or THEY can and do lie all they want. But by amending & extending his 'testimony', he will not be ridiculed by historians in the future.