Marco Rubio is visiting NATO's headquarters for a meeting of foreign ministers, putting him on the front lines of the Trump administration's push against U.S. allies.

The secretary of state’s trip comes amid an abrupt shift in relations between the United States and Europe after close cooperation during the Biden era.

Rubio arrives in Brussels on Thursday for two days of meetings with his NATO counterparts and European officials, and he can expect to be confronted with questions about the future U.S. role in the alliance. With him on the trip will be newly confirmed U.S. ambassador to NATO Matt Whitaker.

US Secretary of State Marco Rubio on Thursday underscored the need for NATO allies to spend more on defence, as the world was reeling from President Donald Trump's announcement of sweeping new tariffs on all imports to the United States.

Ukrainian Foreign Minister Andrii Sybiha believes that Western partners should impose new sanctions on Russia to compel it to pursue peace in Ukraine. Source: Sybiha in Brussels at a joint briefing with the NATO secretary general before the meeting of the NATO-Ukraine Council,

Giving up American military leadership of the NATO alliance would be "problematic," Gen. Christopher Cavoli told senators Thursday.

U.S. Secretary of State Marco Rubio and the Trump administration’s new envoy to NATO are seeking to reassure wary NATO allies of the U.S. commitment to the alliance.

Secretary of State Marco Rubio insisted that Donald Trump’s administration has no intention of leaving NATO even as the U.S. envoy demanded members of the military alliance ratchet up spending.

Secretary of State Marco Rubio told NATO allies on Thursday that Washington remained committed to the alliance but expected them to spend far more on defense and would give them some time to do so.

Marco Rubio warns Russia to take action on Ukraine peace talks - ‘We will know soon enough, in a matter of weeks, not months, whether Russia is serious about peace or not,’ said Rubio

The United States will know in a matter of weeks if Russia is serious about peace with Ukraine, U.S. Secretary of State Marco Rubio said on Friday, after European allies accused Moscow of stalling over the Trump administration's call for a ceasefire.

U.S. Secretary of State Marco Rubio said Friday that President Donald Trump does not want to be “drawn into the trap of endless negotiations” with Russia over ending the war in Ukraine, adding that it would soon become clear whether Moscow is serious about peace.