Nah, it won't need something like that, but it will take time.
The first thing that has to happen, of course, is removing the Trump regime in 2020 and restoring a functional democracy. That gets rid of a major cause of divisiveness and reminds Republicans that no, they're not entitled to the one-party dictatorship they so desperately want.
The more important part, however, is 2024 (and possibly 2028). That's ideally when the Dems defeat the Republicans again and send a message that the Republicans must modernize their party or be rendered permanently irrelevant. The GOP has to stop obsessing over white, straight Christian men in an era when they're neither the sole arbiters of culture nor likely to have a dominant vote.
The outcome of 2020 is far from certain, but I can't help but see 2016 as the last hurrah of the Republican party as we know it. Goodness knows there have been enough of them bailing in the past couple of years. I'm not so naive as to presume the party will suddenly be enlightened, but it would be nice if it dropped its obsession with courting science deniers and social regression in favor of focusing on finances and the reach of government.