GOP Sen. Lindsey Graham of South Carolina on Sunday blasted President Joe Biden, accusing him of being a "destabilizing" leader during his first 100 days in office.

In an interview on "Fox News Sunday," Graham told host Chris Wallace that Biden started off his presidency straying away from the tone of his successful 2020 presidential campaign.

"During the campaign, he made us all believe Joe Biden would be the moderate choice ... that court-packing was a bonehead idea," Graham said. "All of a sudden we have a commission to change the structure of the Supreme Court. Making DC a state ... I think that's a very radical idea that will change the makeup of the United States Senate."

He added: "AOC [Democratic Rep. Alexandria Ocasio-Cortez of New York] said his first 100 days exceeded her expectations. That's all you need to know."

Graham quickly laced into Biden's overall performance.

"I think he's been a very destabilizing president," Graham said. "And economically, he's throwing a wet blanket over the recovery, wanting to raise taxes in a large amount and regulate America basically out of business, so I'm not very impressed with the first 100 days."

Biden supports raising the corporate tax rate from 21 percent to 28 percent to fund his proposed $2 trillion infrastructure bill, but he is open to negotiations with GOP lawmakers.

The conservative senator then derided the president as "a disaster on foreign policy."

"The border is in chaos, the Iranians are off the map, he's opening up negotiations with the Iranian regime and they haven't done a d--- thing to change," he said. "Afghanistan's going to fall apart. Russia and China are already pushing him around, so I'm very worried."

Republicans have criticized the Biden administration's immigration policies, including their approach to housing the unaccompanied minors who have fled to the US-Mexico border in recent months.

Conservatives have also cast doubt on Biden's timetable to withdraw troops from Afghanistan, along with his long-term approach for dealing with Presidents Vladimir Putin of Russia and Xi Jinping of China.

As Biden approaches his 100th day in office, a new Fox News poll shows Biden with a 54 percent job approval rating, while 43 percent disapproved of the president's performance.

Graham expressed that he was in the latter category.

"I like Joe Biden, but I'm in the 43 percent," he said.