From Josh Kraushaar’s “Prepare for a Biden landslide: The biggest warning sign for Trump’s reelection: He’s starting to see softening support from his base” at The National Journal:

The latest Fox News poll, showing Biden with a 12-point lead over Trump, offers the latest hint that some of the president’s closest allies are starting to lose the faith….Indeed, Trump is seeing a little bit of slippage among white evangelical voters, the core constituency that fueled his victory in 2016. His approval rating among that voting bloc is 72 percent, with fewer than half “strongly approving” of his performance in office. The president is only winning 66 percent of the vote against Biden in a head-to-head matchup, with the former vice president tallying 25 percent support with evangelicals.

For context, Trump won the evangelical vote by a 64-point margin against Hillary Clinton, 80 to 16 percent. Winning two-thirds of the vote may sound impressive, but slipping 14 points in four years is a major problem.

Rural voters also comprised another solid bloc of Trump’s support in the 2016 election, handing him 61 percent of the vote. But the Fox poll shows Trump only winning 49 percent of the rural vote this time around, holding a mere 9-point lead over Biden. His 53 percent job approval with these small-town voters is barely above water.

Yes, there are a lot of things that can happen during the next 4 months. But there are no recent data  which the GOP can find encouraging. Kaushaar continues,

So what does it all mean for the November election? Right now, it looks more likely that Biden will win a landslide victory, picking up states uncontested by Democrats in recent elections, than it is that Trump can mount a miraculous turnaround in just over four months. Even as Trump tries to advance a law-and-order pitch amid growing violence and tumult in the nation’s cities, it’s unlikely to benefit the president because he’s the leader in charge. The chaos candidate is now the chaos president. Biden is the challenger pledging a return to normalcy.

Just look at the swing-state map: Biden is leading in every battleground state, according to the RealClearPolitics polling averages, with the exception of North Carolina where the race is tied. Trump trails by 6 points in the electoral prize of Florida, where the president’s newfound willingness to meet with Venezuelan dictator Nicolas Maduro prompted a fierce backlash and quick White House retreat. He’s down 4 points in Arizona, a state that has only voted for a Democratic presidential candidate once since 1964. He’s not close to hitting even 45 percent of the vote in Michigan, Pennsylvania, or Wisconsin—the Midwestern states he flipped to win the presidency…Public polling even shows Biden within striking distance in Georgia and Texas, two electoral prizes that would normally be safely Republican … unless a big blue wave hits in November.

All of the usual caveats about 4 months to go being a long time to go and the polls always narrowing in the last week of the campaign notwithstanding, the best data indicates that the GOP is on a fast track a rout of historic proportions for both the presidential election and down ballot.