I n just three weeks, President Donald Trump has exploded long-standing U.S. foreign policy and sided with Russia against Ukraine and

Some of the most vocal critics of Vladimir V. Putin and proponents of the United States’ role as a global defender of democracy have acquiesced to Mr. Trump on Russia.

Republican senators are pushing back against the Trump administration’s reluctance to blame Russia for the Ukraine war, particularly after the U.S. sided with Russia and North Korea in a U.N. vote opposing a resolution condemning Moscow’s aggression.