Sen. Chuck GrassleyChuck GrassleyGOP senators pitch alternatives after House pulls ObamaCare repeal bill Friends, foes spar in fight on Trump’s Supreme Court nominee Live coverage: Day three of Supreme Court nominee hearing MORE (R-IA) took a break from the vote-a-rama last night to tweet his outrage at accusations of phoniness:
Can't bleve it!!! A reporter came all way to Senate floor to ask if I do my own tweetin. Of course I do.

In fact, Grassley is one of the more colorful of congressional tweeters, often using colloquial short-hand that seems above the head of some of his colleagues. A recent example:
Bfast free bremer co Farm buro Ag Wk Recognition. Took Pat to his constituents too Got great support for AIG stand. Adressed group Listnd 2