(Image Credit: @ChuckGrassley/Twitter)

Sen. Chuck Grassley's tweets this weekend were more battle cry than bird song as he attacked President Obama twice in one day.

On Saturday morning, the U.S. senator from Iowa accused Barack Obama of being more "stupid" than the American people. The exact tweet said, "Constituents askd why i am not outraged at PresO attack on supreme court independence. Bcause Am ppl r not stupid as this x prof of n law."  Later in the day, he told Obama to "wake up" to the situation in Syria.

Obama Campaign Manager Jim Messina tweeted his disapproval for the senator's comments, saying, "Ive know  @ ChuckGrassley  a long time. I am saddened he would embarrass himself like today with his comments about the President.

Former Obama Senior Advisor David Axelrod was not quite so kind. "Heads up, Sen. Grassley. I think a 6-year-old hijacked your account and is sending out foolish Tweets just to embarrass you!"

Grassley also received criticism for the typos in his tweets. Just before the tweet to President Obama, his account sent out a  tweet with just one letter: "P." The Iowa State Daily put together a collection of Grassley's mistweets on Storify .

Grassley's spokesperson said of the Twitter wars, "In his Tweet on Saturday, Sen. Grassley said that it doesn't speak well of any constitutional law professor to not understand Marbury v Madison, and that the people understand the independence of the judiciary."

Obama. who taught constitutional law at the University of Chicago, isn't the only one to take heat from Grassley's social media lash outs. Last week, the senator went on a Twitter tirade against the History Channel, calling it the "nonhistory channel.

Grassley has been tweeting since November 2007. He has over 40,000 followers and tweets on average about 1.15 times per day.