The Des Moines Register reported the Republican senator said his Democratic counterpart acted inappropriately when he recently called on Iowans to push Grassley toward voting to override a presidential veto of proposed troop withdrawals from Iraq.
"Let's say pretty much that it's not senatorial and if you can't be senatorial, how can you be presidential?" Grassley asked.
"You know what really makes it less presidential is, I'm not running for president," he added. "I'm not one of his opponents."
While Obama never mentioned the Iowa senator by name, he did mention that a certain senator from Iowa could prove invaluable in the override process.
Yet Grassley said that he is still on good terms with Obama despite the remarks and will likely just ignore the incident altogether, the Register reported.