The race to be the next Republican presidential nominee will hit a new gear this week, with Florida Gov. Ron DeSantis expected to officially launch his much anticipated campaign.

But what’s long been framed as a battle between Donald Trump and DeSantis, Trump’s one-time ally, appears on the verge of sprawling into a crowded contest.

At least one other contender is expected to formally declare a candidacy this week: Sen. Tim Scott of South Carolina filed paperwork Friday to establish a campaign after months of positioning himself for a run, and he’s set to hold his official launch on Monday. A half-dozen or more could soon join the fray.