Iowa Sen. Chuck GrassleyCharles (Chuck) Ernest GrassleyGOP noncommittal about vote on potential Trump-Pelosi coronavirus deal Republicans: Supreme Court won't toss ObamaCare Barrett sidesteps Democratic questions amid high-stakes grilling MORE (R) celebrated Constitution Day and his 81st birthday early Wednesday morning with a 6.2 mile run.

Grassley tweeted a post-workout picture of him standing outside the steps of the Senate.

In another tweet, Grassley explained that he likes to run from “Home to the Dome” once a year, but otherwise runs three miles each day. During a 2010 question-and-answer, he said he starts running at 5:15 a.m. to get his workout in before work.

Grassley received praise for his fitness on Twitter.