Chuck Grassley
U.S. Senator Charles Grassley, R-Iowa, listens to a question during the Reuters Washington Summit, Oct. 19, 2009. Reuters/Jonathan Ernst

One one of the Senate's most senior Republicans called President Barack Obama stupid in tweet Saturday, his staff confirmed.

Sen. Charles Grassley of Iowa sent a harshly worded message Saturday that intentionally slighted the president, NBC reported.

Aides said Grassley personally Tweeted: 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 con law.

While Grassley's Twitter account had been previously hacked, this time the use of the word stupid was his own. Aides say, The Tweet is Sen. Grassley's. He is saying that it doesn't speak well of any constitutional law professor to not understand Marbury v Madison. The people understand the independence of the judiciary. So he thinks most Americans are smarter on the Constitution.

In a second Tweet, Grassley wrote,Possibility of peace and freedom for Syria gets more remote as PresO plays along w the farce of Kofi Annans negotiatios (sic) there Barack wakeup.