By Dan Peleschuk KYIV (Reuters) -Ask Ukrainians who the country's most powerful figure was after the president, and many would say Andriy Yermak, his chief of staff and a key negotiator during four years of war when Western support has kept Kyiv in the fight.

The investigators are facing no obstacles,” Yermak wrote on Telegram, adding that he was fully cooperating with authorities.

Ukraine’s chief negotiator, in an exclusive interview, says conceding sovereign territory is off-limits in peace talks.

President Volodymyr Zelenskiy's powerful chief of staff Andriy Yermak, a close ally who has headed Ukraine's negotiation team at fraught U.S.-backed peace talks, quit on Friday, hours after anti-corruption agents searched his home.

The majority of Americans disapprove of Trump's handling of the Russia-Ukraine conflict, as the U.S. tries to broker a deal between the two countries.

Ala., joins 'Fox News Live' to weigh in on Steve Witkoff’s planned trip to Moscow to meet with President Vladimir Putin and what it could mean for U.S. involvement in the efforts to end the Russia-Ukraine war.

Andriy Yermak has played a crucial role in Ukraine's response to Russia's war and is lead negotiator in peace talks.

A new U.S. push to end Russia-Ukraine fighting has set off a flurry of diplomacy by American, European, Russian and Ukrainian officials.

President Donald Trump said he would meet with Vladimir Putin and Volodymyr Zelenskyy when a deal to end Russia's war on Ukraine is finalized.

Estonian Foreign Minister Margus Tsahkna spoke with Newsweek about Russia, Ukraine, and NATO's preparations for future conflict.