President Donald Trump will head to a NATO summit this week - as a poll found that more Americans think his administration is siding with Russia over Ukraine.

A Ronald Reagan Institute survey of U.S. adults, conducted from late May to early June, showed 37 percent of respondents believe the Trump administration is favoring Russia when it comes to negotiating an end to the conflict.

Just 14 percent said the Trump White House was favoring Ukraine.

Another 36 percent said the Trump administration was taking a neutral approach - despite Ukraine being a longtime U.S. ally and Russian President Vladimir Putin launching the invasion in February 2022.

The numbers, which were released Sunday, come after Newsweek reported that the U.S. was pressuring European allies to limit references to Ukraine in the final communique of the NATO summit, which will take place Tuesday and Wednesday in The Hague, Netherlands.