Iranian President Mahmoud Ahmadinejad lashed out over the weekend in the wake of President Barack ObamaBarack Hussein ObamaOvernight Energy: Dems ask Pruitt to justify first-class travel | Obama EPA chief says reg rollback won't stand | Ex-adviser expects Trump to eventually rejoin Paris accord Overnight Regulation: Trump to take steps to ban bump stocks | Trump eases rules on insurance sold outside of ObamaCare | FCC to officially rescind net neutrality Thursday | Obama EPA chief: Reg rollback won't stand Ex-US ambassador: Mueller is the one who is tough on Russia MORE signing into law last week the toughest-ever sanctions to come out of Congress.

"Bullying powers know that no room will remain for them in the world if the Iranian nation mounts its efforts," Ahmadinejad said, according to the government-owned Press TV. "They know they cannot do a damn thing with sanctions."

The president encouraged a unified effort to counter Western measures taken against the Islamic Republic for its growing nuclear program.

"At any juncture that Iranians were vigilant and united, even the most bullying powers were brought to their knees," Ahmadinejad said.

Obama on Thursday signed the sanctions law, measures in addition to the latest round of U.N. sanctions on Iran. The Senate had approved the bill 99-0, and the House OK'd the unilateral sanctions by 408-8.