Speaking at the annual Friends of Ireland Luncheon on St. Patrick's Day at Capitol Hill, Biden said Putin is "a murderous dictator, a pure thug who is waging an immoral war against the people of Ukraine," NBC News reported.

"Ireland and the United States and working together for the first time now," Biden said. "They're on the United Nations Security Council ... and the European Union. And Putin is paying a big price for his aggression, and they are part of the reason the cost is going so high."

The president also mentioned his upcoming phone call with Chinese leader Xi Jinping on Friday, joking that Xi “remembers everything I said.”

“Jokes aside,” Biden continued, “He (Xi) does not believe democracy can survive in the 21st century."

Biden added that the world is facing a tipping point in history that happens every few generations.