A heated exchange erupted during a Senate hearing as Sen. Chris Coons (D-DE) challenged Secretary of State Marco Rubio over U.S. relations with NATO allies and US President Donald Trump's past comments regarding Greenland. Coons questioned whether tensions within the NATO alliance had worsened after Trump suggested acquiring Greenland and threatened tariffs against Denmark, a longtime U.S. ally and NATO member.

A heated exchange erupted during a Senate hearing as Sen. Chris Coons (D-DE) challenged Secretary of State Marco Rubio over U.S. relations with NATO allies and US President Donald…

A heated exchange erupted during a Senate hearing as Sen. Chris Coons (D-DE) challenged Secretary of State Marco Rubio over U.S. relations with NATO allies and US President Donald…