Seriously, people need to start saying 'no' to being hauled in front of some congressional hearing/committee. IMO, the reason why that power exists is because way back before the telegraph, it was hard for Legislators to get info/news from what was going on their districts/states so they called trustworthy people down to DC to let them know what was happening back home.
In this current age of instant worldwide communication and information there's no reason to disrupt people's lives and drag them down to DC when it's easier to set up a zoom call meeting or somethin'.
Also the DSA all but said on their website they want to get rid of the Executive Branch and the threat of impeachments is part of that plan. . .well, I know what I'd do if I was in Trump's shoes and the second one of those impeachment attempts fail and I would be very justified in doing so.
Let the DSA members take their oaths of office. Let them try to impeach anyone in Trump's administration. When they fail(not enough Republican votes) then Trump can literally go after the DSA because they all admitted they want to get rid of the Executive Branch and trying to impeach whoever in Trump's administration is very much part of that plan.
