"You can't have a peace agreement unless both sides give and get. You can't have a peace agreement unless both sides make concessions," Rubio told ABC News' "This Week" co-anchor Martha Raddatz. "If not, it's just called surrender, and neither side is going to surrender, so both sides are going to have to make concessions."

Lindsey Graham thinks the next phase of American diplomacy over the war in Ukraine needs to target Moscow's pocketbook. "My advice to President Trump and [Secretary of State Marco Rubio] is, you've got to convince Putin that if this war doesn't end justly and honorably with Ukraine making concessions also,