Exclusive new poll numbers show Democratic presidential candidate Joe Biden extended his lead by three, bringing him to eight points in Michigan over President Donald Trump. “The biggest shift of all came among white senior citizens in Michigan,” said Richard Czuba, CEO of the Glengariff Group. The new WDIV/Detroit News poll was conducted after the first presidential debate and before the president was diagnosed with COVID-19. It is the fulcrum point of this election,” Czuba said. A majority of the people who participated in the poll watched the presidential debate.