Obama, who had made the goal of pursue dialogue with Iran a cornerstone of his administration's foreign policy at the beginning of his presidency, said he had been successful in getting the international community to isolate Tehran.
"As we've seen, the Iranian government has been more concerned about preventing their people from exercising their democratic and human rights than trying to solve this problem diplomatically," Obama said in an interview on Fox News Channel's Report with Bret Baier.
"That's why we're going to go after aggressive sanctions. We haven't taken any options off the table. We are going to keep on pushing," Obama said.
"That's why we're going to go after aggressive sanctions. We haven't taken any options off the table. We are going to keep on pushing," Obama said.
Obama said prevent Iran from acquiring a nuclear weapon was one of his administration's highest priorities.
U.S. officials said on Tuesday the pace of Iran's nuclear weapons development appears to have slow, buying time for a new round of sanctions now and possibly more sweeping measures later.