The People’s House is under attack; each branch has its own Constitutional rules, and must protect them.
A lawsuit is just a way to ask the Judiciary if it wants to gang-up on the ‘Resident. It might, it might not. If it does, it will be awhile.
OTOH, the House has tools, if they just wouldn’t give them up and put them out of play.
Send the Sergeant-At-Arms to arrest everyone in the White House EXCEPT the half-breed. Charge them with contempt of Congress. Starting with the lowest level functionary, offer immunity to the FIRST one to roll. Repeat until ALL levels are implicated.
...and what will we get out of the deal, what’s the lawsuit about? Obama’s failure to fully implement 0care. Great!