Official Worst Tweeter Chuck Grassley today further proved his technological ineptitude, when in the middle of his own speech on the senate floor, the senator's iPhone began to ring, interrupting his discussion of some unspecified "standards."

Grassley looks plainly irritated as he roots around his pants pocket for the offending device. After three rings, much fumbling, and one whispered but audible "doggone it...", the phone shuts up. And Grassley picks up right where he left off, unruffled by his own disruption.

You keep doing you, Chuck Grassley. Your foibles never fail to amuse. [BuzzFeed]

Update: The senator does not say "fuck," as previously reported. He mutters "doggone it."