Are the Democrats now the party of Reagan?

A son of Bobby Kennedy has endorsed a Republican for president. Meanwhile, former Rep. Adam Kinzinger (R-Ill.) was among the prominent Reagan Republicans given a speaking role at the Democratic National Convention.

It’s not exactly, to quote “Ghostbusters,” dogs and cats living together…mass hysteria. But it’s close.

The political realignment that began with Donald Trump’s 2016 election has escalated, with the parties swapping some key parts of their brand identities...