There is not more loyal opposition. They simply want to destroy this presidency. The do not respect democracy just their agenda.
From the Washington Examiner:
The top Democratic leaders in Congress condemned the presidency of Donald Trump on Tuesday at a National Press Club Forum, where they hinted they might eventually seek to impeach him and they predicted his address to the House and Senate on Tuesday would be full of empty promises.
House Minority Leader Nancy Pelosi, D-Calif., said Trump has misled the public to a degree that “there are plenty of grounds right now for the current president” to be impeached. But the public is not fully on board yet, Pelosi said, because “many of the president’s supporters are not ready to accept the fact that their judgment may not have been so great in voting for him.”
Pelosi said by the time the case is made for impeachment, “perhaps they will be ready to accept that.”