The poll, which ran from April 15-20 in Michigan, Wisconsin and Pennsylvania, showed 45% of registered voters said they would support Biden, the presumptive Democratic nominee, while 39% said they would support Trump.

It also found that Biden, vice president under Trump’s predecessor Barack Obama, has an advantage of 3 percentage points among registered voters in Wisconsin, 6 points in Pennsylvania and 8 points in Michigan.

The Ipsos poll shows Biden has maintained or slightly improved his lead over Trump in those states over the past few months, even though his campaign and the presidential primaries have been sidelined by the coronavirus pandemic. The United States has the most confirmed cases and deaths in the world with at least 821,000 people infected and at least 46,000 deaths.