Amid inflamed tensions, Moscow and Belarus have been conducting military exercises nearby, placing neighboring countries on high alert. Poland has closed its border to Belarus, Russia's close ally, and NATO has launched an "Eastern Sentry" to bolster the defense of Europe's eastern flank, Secretary-General Mark Rutte announced Friday.

Now the time has come for NATO to defend itself, and European allies might have to do it alone, experts and leaders say.

“The United States stands by our NATO allies in the face of these alarming airspace violations,” she said.

President Donald Trump on Saturday outlined the road to new sanctions against Russia in an effort to stop that country's war in Ukraine.

President Donald Trump said Saturday he is “ready to do major Sanctions on Russia ” once all NATO countries have started “to do the same thing” and pause their purchases of oil from Moscow.

“I believe that this, plus NATO, as a group, placing 50% to 100% TARIFFS ON CHINA, to be fully withdrawn after the WAR with Russia and Ukraine is ended, will also be of great help in ENDING this dead...