U.S. President Donald Trump is meeting face-to-face with Russian President Vladimir Putin in Alaska on Friday for a high-stakes summit that could determine not only the trajectory of the war in Ukraine but also the fate of European security, Associated Press reported.

The sit-down offers Trump a chance to prove to the world that he is both a master dealmaker and a global peacemaker. He and his allies have cast him as a heavyweight negotiator who can find a way to bring the slaughter to a close — something he used to boast he could do quickly.

For Putin, a summit with Trump offers a long-sought opportunity to try to negotiate a deal that would cement Russia’s gains, block Kyiv’s bid to join the NATO military alliance and eventually pull Ukraine back into Moscow’s orbit.

There are significant risks for Trump. By bringing Putin onto U.S. soil, the president is giving Russia’s leader the validation he desires after his ostracization following his invasion of Ukraine 3 1/2 years ago. The exclusion of Ukrainian President Volodymyr Zelenskyy from the summit also deals a heavy blow to the West’s policy of “nothing about Ukraine without Ukraine” and invites the possibility that Trump could agree to a deal that Ukraine does not want, according to Associated Press.