About 80 percent of the US population lives in metropolitan or suburban areas. Trump lost those areas in South Carolina in a big way. That calls into question Trump's ability to appeal to those voters in sufficient numbers to carry swing states.There is no sign that the GOP is starting to coalesce around Trump's candidacy because there is no sign that the Trump campaign wants that support.
The key element missing from Trump's campaign is any hint that it recognizes that he needs the support of voters who are not Trump loyalists to win. Indeed, Trump's campaign seems more fixated on maligning Haley and even DeSantis, who is no longer in the race, and their supporters than building bridges. The operating principle seems to be that they think no matter the lies, abuse, and invective directed at them, everyone will come home to Trump in November because of Biden. I think this underestimates the degree to which many Republicans and conservatives actively dislike Trump and how many will vote for Joe Biden on not voting the top line on the ballot rather than supporting Trump.
Several other interesting points made; RTWT.