U.S. Democratic presidential candidate and former Vice President Joe Biden and his wife Jill greet supporters as they prepare to board an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden gestures to supporters on a nearby rooftop as he makes remarks before boarding an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden makes remarks as he prepares to board an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden and his wife Jill wave to supporters as they walk to an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden speaks to supporters after arriving on an Amtrak train for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden and his wife Jill greet supporters as they prepare to board an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden makes remarks as he prepares to board an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden salutes to supporters as he walks to an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden makes remarks as he prepares to board an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden makes remarks as he prepares to board an Amtrak train to begin a campaign train tour in Cleveland, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden greets supporters after arriving on an Amtrak train for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden and his wife Jill greet supporters after arriving on an Amtrak train for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden greets supporters after arriving on an Amtrak train for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

Supporters of U.S. Democratic presidential candidate and former Vice President line a railroad track as Biden's campaign train arrives for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden speaks to United Auto Workers (UAW) auto assembly line worker Tom Davis at a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden greets supporters after arriving on an Amtrak train for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

A young boy holds a mobile phone as he sits with his mother while they attend a campaign stop by U.S. Democratic presidential candidate and former Vice President Joe Biden in Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden speaks to supporters after arriving on an Amtrak train for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden speaks to supporters after arriving on an Amtrak train for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden and his wife Jill speak to supporters while riding aboard a campaign Amtrak train near Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden and his wife Jill speak to supporters while riding aboard a campaign Amtrak train near Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden speaks to supporters while riding aboard a campaign Amtrak train near Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden and his wife Jill speak to supporters while riding aboard a campaign Amtrak train near Alliance, Ohio, U.S., September 30, 2020.

U.S. Democratic presidential candidate and former Vice President Joe Biden speaks to supporters after arriving on an Amtrak train for a campaign stop in Alliance, Ohio, U.S., September 30, 2020.