Biden told a ballroom audience Monday at the University of Akron that Strickland reflects Democratic Party values fundamentally different than Republican nominee John Kasich.
Biden acknowledged high energy by Tea Party members and conservative Republicans. But he says a higher-than-expected Democratic turnout can help the party maintain control of the House and Senate.
Kasich led Strickland by 17 percentage points in the latest poll, released last week by Quinnipiac University.
Republican National Committee spokesman Ryan Tronovitch says Biden's visit will remind voters of job losses during the Obama administration.