Challenge/WI: President Mondale in 1984?

The path to Reagan's victory in 1984 was not exactly solid. After winnin in 1980, Reagan's early years saw the economy in bad shape, low approval ratings, and throughout his Presidency (even after he won) a supermajority disagreed with him politically, and there was a lot of criticism of the President over various things. However, it essentially boiled down to the economy, which did pick up, raised his approval ratings, and won Reagan the election. So, how can Walter Mondale win the election of 1984? And what would be the effects of him winning?
 
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