A recent Fox News poll has Biden, the presumptive Democratic nominee, leading President Trump, 50-38, as concerns grow over the coronavirus pandemic, racism and unemployment.
He also leads Trump by 8.8 percentage points in an average of the latest national polls compiled by Real Clear Politics.
Months before his election defeat, Dukakis held a 55-38 lead over Bush, according to a July 26, 1988, Newsweek/Gallup poll, cited by the Boston Globe.
Ronald Reagan, the incumbent president at the time, also referred to Dukakis as an "invalid," prompting questions over the governor's mental state.
“I think I dropped eight points in the week Reagan called me ‘the invalid,’” Dukakis recalled in a recent e-mail to the Globe.