By this time next year, the Iowa caucus and New Hampshire primary will already be in the rear-view mirror for Republicans. Democrats will have conducted a primary in South Carolina, and both parties will have held primaries in Nevada and Michigan. And one year from now on March 5, a dozen states will hold their Super Tuesday primaries.

The nomination battles for both parties are likely to lead to four possible general-election configurations. There would be the obvious one, pitting President Biden against former President Trump. A second might be Biden against a non-Trump Republican, a third might be Trump versus a non-Biden Democrat, and the fourth would feature a non-Biden Democrat against a non-Trump Republican.

A Biden-Trump rematch would pit the two highest-profile and arguably most-polarizing figures in their respective parties against one another. It would match an incumbent three weeks short of an 82nd birthday against his 78-year-old predecessor, making each the oldest nominee in their respective party's history.

The bipartisan November All America Economic Survey of adults by Hart Research and Public Opinion Strategies for CNBC found

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