Sen. Chuck GrassleyCharles (Chuck) Ernest GrassleySenators push mandatory sexual harassment training for members, staff Senate panel to hold hearing on bump stocks, background checks Senate panel to hold hearing on bump stocks 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