Jim Himes actually said...

If you have a congressional subpoena, you show up, full stop.

A quid pro quo makes the situation more serious, but I would also point out, Anderson, that the chief of staff, Mick Mulvaney, two weeks ago...

I want to sort of downplay the importance of this so-called quid pro quo. Quid pro quo is what the defenders of the president are saying is ...

I want to emphasize a quid pro quo is not necessary for there to have been an abuse of power.