Chuck Grassley actually said...
We are having hearing next Wednesday so obviously we want to hear right away so we get the subpoena. I hope they accept the subpoena voluntarily. If they don't, then you have to have a marshal give it and that takes a little more time.
Context
Senator Grassley discusses the upcoming hearing and the possibility of issuing subpoenas if Trump Jr. and Manafort do not comply.
07/19/2017