Secretary of State Marco Rubio told NATO allies they must make hard choices and increase defense spending to 5% to bolster capabilities in face of emboldened adversaries.

BRUSSELS -- U.S. Secretary of State Marco Rubio and the Trump administration’s new envoy to NATO arrived Thursday in Brussels, where the alliance’s top diplomats are hoping they’ll shed light on U.S. security plans in Europe.

U.S. Secretary of State Marco Rubio on Friday downplayed the impact of the Trump administration's tariffs on NATO members' ability to finance the increases in military spending Washington is pushing for.

U.S. Secretary of State Marco Rubio on Thursday called for America's partners in the NATO alliance to up their defense spending to 5% of their GDP.

U.S. Secretary of State Marco Rubio dismissed what he said was "hysteria" about America's future in NATO, saying President Donald Trump has been clear that the U.S. will remain in the defensive alliance.

Secretary of State Marco Rubio is traveling this week to a gathering of top diplomats. He is sure to find allies alarmed, angered and confused.

The secretary of state said the U.S. will also need to increase its military spending and that Trump remains committed to the alliance.

Secretary of State Marco Rubio is in Brussels Thursday trying to reassure allies of the United States' commitment to NATO.

European allies and Canada are deeply concerned by President Trump’s readiness to draw closer to Russian leader Vladimir Putin, who sees NATO as a threat, as the US works to broker a cease-fire in Ukraine.