Special U.S. envoy Steve Witkoff says Russian leader Vladimir Putin agreed at his summit with President Donald Trump to allow the U.S. and European allies to offer Ukraine a security guarantee resembling NATO’s collective defense mandate as part of an eventual deal to end the 3 1/2-year war.

Lawmakers retreated to their partisan corners in response to the Trump-Putin summit in Alaska, with Republicans praising the president and Democrats arguing he was too cozy with Putin.

The US president said a peace agreement would be better than a "mere" ceasefire, hours after summit with Putin that produced little.

Special U.S. envoy Steve Witkoff said Sunday that Russian leader Vladimir Putin agreed at his summit with President Donald Trump to allow the U.S. and European allies to offer Ukraine a security guarantee resembling NATO's collective defense mandate as part of an eventual deal to end the 3 1/2-year war.

Russia already controls a fifth of Ukraine, including about three-quarters of Donetsk province, which it first entered in 2014.