NATO ministers seek clarity from the U.S. on Trump's troop decisions amid rising concerns about coordination and European defense.

Secretary of State Marco Rubio will travel this week to a NATO foreign ministers meeting in Sweden, where U.S. plans to reduce troop levels in Europe coupled with President Donald…

The summit will focus on the Trump administration's plans to withdraw guarantees of support for European security architecture – even in wartime – and the depletion of the…