US President Joe Biden's public approval rating fell to a new low of 40% this week, a clear warning sign for his Democratic Party as it seeks to retain control of Congress in the Nov. 8 election, according to a Reuters/Ipsos opinion poll, Reuters reported.

The national poll, conducted on March 21 and 22, found that 54% of Americans disapprove of his job performance as the country struggles with high inflation and Russia's invasion of Ukraine has pushed geopolitical concerns to the fore.

Biden's approval rating is down three percentage points from the prior week.

Poll respondents cited the economy as their top concern, followed by war and foreign conflicts.

Joe Biden's popularity began dropping in mid-August as COVID-19 deaths began to rise and the US military faced a chaotic withdrawal from Afghanistan.