Trump's national security adviser has also indicated that the US is ready to ramp up sanctions pressure on Russia if it declines a 30-day ceasefire

Ukraine should be prepared to give up certain territories as part of any future peace negotiations with Russia, US National Security Adviser Mike Waltz has said.

Kiev claims sovereignty over Crimea, the Donetsk and Lugansk People's Republics, as well as Kherson and Zaporozhye Regions. The territories officially became part of Russia after referendums in 2014 and 2022. Moscow has maintained that their status is non-negotiable.

Speaking to ABC News on Sunday, Waltz said that a potential settlement to the Ukraine conflict "is going to be some type of territory for future security guarantees" for Kiev.

According to the official, an alternative in the form of NATO membership for Ukraine "is incredibly unlikely." Ukraine has demanded accession to the US-led military bloc whereas Moscow views Kiev's NATO aspirations as a root cause of the ongoing conflict.

According to Waltz, attempts to "drive every Russian off of every inch of Ukrainian soil, including Crimea" would be unrealistic at this point. The ongoing diplomatic efforts spearheaded by the US should focus on the "reality of the situation on the ground," the national security adviser argued.

Also on Sunday, in an interview with Fox News, Waltz said that "we are engaging in diplomacy, and that will involve both carrots and sticks to get both sides to the table." When asked whether US President Donald Trump was prepared to "punish" Russian President Vladimir Putin with more sanctions if he rejected a ceasefire, Waltz replied that "all options are on the table."

Earlier this week, US Secretary of State Marco Rubio revealed that representatives from Washington and Kiev had "had conversations" on the issue of territorial concessions during the talks in Saudi Arabia's Jeddah on Tuesday. The diplomat argued that "neither side can militarily achieve their maximalist goals."

He similarly predicted that "obviously, it'll be very difficult for Ukraine in any reasonable time period to sort of force the Russians back all the way to where they were in 2014."

Following the negotiations in Jeddah, Ukraine agreed to a 30-day ceasefire.

Trump's special envoy, Steve Witkoff, traveled to Moscow on Thursday to present Putin with the details of the proposal.

The Russian head of state welcomed the ceasefire in principle but insisted on addressing several salient issues first, including the fate of the Ukrainian troops encircled in Russia's Kursk Region.