GOP candidates challenge Trump-DeSantis alliance as DeSantis falters.

A new wave of GOP presidential hopefuls, including former Arkansas Gov. Asa Hutchinson, former Vice President Mike Pence, and South Carolina Sen. Tim Scott, are expected to enter the race soon. They hope to emerge as an alternative to early frontrunners Donald Trump and Florida Gov. Ron DeSantis, who have been attacking each other. The Republican National Committee has scheduled the first debate for August, and candidates may need to cement their planning soon, even if they'd prefer to wait longer. The race is still wide open, and unexpected outcomes are possible.