'Warning signs flashing': Biden, Trump struggle to lock up base voters ahead of first debate

As they prepare for their face-off on the debate stage next month, warning signals are flashing for President Biden and former President Donald Trump in their 2024 election rematch - as they both appear to 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 with Hamas in Gaza.

"You 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.

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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 results, Haley grabbed 21% support in Maryland and 18% in Nebraska.

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And Haley performed strongest in suburban areas in both states, as she also did in earlier primaries held after she suspended her presidential bid. It's another potential general election problem for Trump, who is currently making history as the first former or current president to stand trial in a criminal case.

"It might just be that Republicans want one last chance to express their