Primaries show Biden and Trump lack support of key constituents

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As they move toward facing off on the debate stage next month, President Biden and former President Trump are exhibiting signs of weakness in their 2024 election rematch – as they both apparently struggle to lock up their base voters.

More than two months after she dropped out of the Republican presidential nomination race, zombie candidate Nikki Haley is still grabbing sizable support in the GOP primaries at the expense of Trump.

And Biden is continuing to deal with a persistent "uncommitted" vote protesting the president's support for Israel in its war in Gaza against Hamas.

"You're going to see most Democrats and most Republicans come home. But there are so many warning signs flashing in these primaries," David Kochel, a longtime Republican consultant and veteran of numerous GOP presidential campaigns, told Fox News Digital.

FOX EXCLUSIVE: TRUMP AGREES TO BIDEN PROPOSAL FOR PRESIDENTIAL DEBATES

One week after Haley won 22% of the vote in Indiana's GOP presidential primary, where independents and Democrats could vote, it was supposed to be a different story on Tuesday as Maryland, Nebraska, and West Virginia held mostly closed Republican contests.

But according to unofficial and incomplete results, Haley grabbed 20% in Maryland and 18% in Nebraska.

TRUMP AHEAD OF BIDEN IN THESE