With France raising taxes on big tech firms, Washington says American companies are being unfairly targeted.

Russia has demanded security guarantees that U.S. and NATO officials cannot accept, but there could still be room for building a sustainable dialogue on European security.

President Putin’s deployment of troops in two separatist Ukrainian regions has nearly shut the door on diplomacy and intensified a showdown over European security.

The European Union and the United Kingdom came to a last-minute trade deal on Christmas Eve, narrowly averting the hardest of all potential Brexits. But major uncertainty remains.