Aides on Capitol Hill fear that a dramatic government failure may be the only thing to force President Trump and the Democrats back to the table.
Capitol Hill Aides Wait for a Disaster to End Shutdown - The Atlantic
The Shutdown ending in disaster can only be avoided by intervention to remove/replace either the POTUS by impeachment/indictment or removal by the DNC of the Speaker of the House.
Regardless of who is right or wrong in the conflict the greatest threat is that the authority of the Office of the Presidency is at stake.
Far better to humiliate the Speaker of the House rather than The POTUS (which is the plan of the Radical marxist Progressives of the DNC).
IMO Pelosi must go for the sake of the nation.