Sen. Markwayne Mullin cast doubt on suggestions from Ukrainian President Volodymyr Zelenskyy that Russian President Vladimir Putin could invade NATO allies

NBC News National Political Correspondent Steve Kornacki examines how Americans are reacting to the first month of the Trump administration. Republican Sen. Markwayne Mullin (Okla.) discusses the war in Ukraine as it enters its third year.

"President Trump is the only one who could have prevented this war from taking place," Mullin said during a CNN interview.

Sen. Markwayne Mullin (R-Okla.) says he thinks people need to “trust the process” in President Trump’s peace talks with Russian and Ukrainian leaders. “Right now, people are dying every single

Scott Mitchell and Alex Cameron discussed the latest developments in D.C., including budget negotiations, divisions over Ukraine aid, and Sen. Markwayne Mullin’s growing influence with the White House.

And “This Week” co-anchor and ABC News Chief Global Affairs Correspondent Martha Raddatz and ABC News Chief Foreign Correspondent Ian Pannell discuss the latest on President Trump’s push for peace talks to end the war in Ukraine. Like “This Week” on Facebook here. You can also follow the show on Twitter here.