WASHINGTON – Ukrainian President Volodymyr Zelenskyy is visiting Washington on Thursday as U.S. support for his country’s fight against Russia faces a partisan reckoning in this year’s presidential election.

Vice President Kamala Harris, the Democratic nominee for president, has pledged to continue sending military assistance to Ukraine if she’s elected, and she’ll have her own meeting with Zelenskyy after the Ukrainian leader sits down with President Joe Biden.

Zelenskyy’s tumultuous relationship with former President Donald Trump, the Republican nominee, continued to deteriorate this week. Instead of meeting with Zelenskyy, Trump has criticized him. As for U.S. support for Ukraine, Trump complained that “we continue to give billions of dollars to a man who refuses to make a deal” to end the war.

It’s the most politically treacherous landscape that Zelenskyy has encountered in Washington since the war with Russia began nearly three years ago. Ukrainian officials are anxious to maintain good relations with whoever becomes the next president of the United States, which is its biggest and most important provider of arms, money and other support.

But the effort risks slipping into the political blender of the election, polarizing the discussion around a war that used to be a bipartisan cause célèbre in Washington.

The latest round of sniping started on Sunday when The New Yorker published an interview with Zelenskyy in which Trump was criticized for his handling of the situation.