A series of Trump administration moves over the last two weeks — including decisions to lift sanctions on Russian diesel and delay other measures targeting the Russian economy — have led both Republicans and Democrats to question whether President Trump is changing course and siding with Russian President Vladimir Putin over Ukrainian President Volodymyr Zelensky in the war between their two countries.

"Russia, frankly, has been fine on Ukraine," Trump told reporters on Monday. "They haven't been doing much."

In contrast, the president continued, "We've given a lot to Ukraine. They've given nothing to us. Remember that."

Russia and Ukraine have been at war for more than 12 years. But in February 2022, the conflict entered a new, deadlier phase when Putin launched a full-scale invasion of Ukraine and tried to seize territory. The fighting has since become a grinding war of attrition. The United St...