US President Donald Trump’s reported deal with Russian President Vladimir Putin to import Russian diesel has drawn criticism from both Republicans and Democrats, with lawmakers warning that the move could help finance Russia’s war against Ukraine and undermine US interests.

Trump announced the deal last week, saying it would help ease soaring fuel prices for Americans ahead of the crucial midterm elections.

Critics have questioned the agreement’s legality under existing US laws and warned that it could bring Washington closer to Moscow at the expense of Ukraine.

The controversy has revived concerns over Trump’s approach to Putin and a series of instances in which critics say the US president has aligned himself with the Russian leader.

“All roads lead to Putin,” former House Speaker Nancy Pelosi declared during Trump’s first term, pointing to what she viewed as his close ties with the Russian president.

William Taylor, a former US ambassador to Ukraine and now a senior fellow at the Atlantic Council, said the agreement could have serious consequences for both Ukraine and the United States.

“The harm to the Ukrainians is real,” Taylor said in an interview on Monday. “And the cost to us, the United States, is high.”

The criticism comes as Trump faces growing political pressure at home. A new AP-NORC poll found that most Americans believe he is using the presidency for personal financial gain in ways they consider unethical or illegal, and that he is more focused on accumulating wealth than helping ordinary people.

Meanwhile, Trump is preparing to travel to Alaska on Tuesday to campaign for a Republican incumbent senator, underscoring growing concerns within the party about retaining control of Congress in the upcoming midterm elections.