US President Donald Trump confirmed he has spoken with Russian President Vladimir Putin about placing limits on nuclear weapons and stressed the need for China to join future agreements. Speaking at the White House during South Korean President Lee Jae-myung’s visit, Trump warned of Beijing’s growing arsenal and tied arms control talks to wider efforts to resolve the Ukraine conflict. He acknowledged frustrations with Russia’s continued military actions in Ukraine but underlined Washington’s backing for Kyiv’s sovereignty and ongoing discussions on security guarantees.