Joe Biden’s campaign seized on a fresh line of attack on the eve of the Democratic presidential nominee’s first debate with President Donald Trump, accusing the Republican incumbent of gaming the system to avoid paying his fair share of taxes.

Trump, a self-proclaimed billionaire who is seeking reelection in the Nov. 3 vote, paid only $750 in federal income taxes in both 2016 and 2017, after years of reporting heavy losses from his businesses to offset hundreds of millions of dollars in income, the New York Times reported on Sunday, citing tax-return data.