According to multiple sources within the group, officially known as "The Eight-Year Alliance," DeSantis is "a proven winner," a contender with a depth of policy proven by what he's accomplished at the state level, and a leader who "does what he says."
The primary motivation of the group, the sources said, is to promote a candidate they feel would be a viable contender for two presidential terms, something they see in DeSantis. They also want to prevent former President Donald Trump "immediately becoming a lame-duck president" should he win back the White House, considering the polarizing affect his persona has had on American politics.
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Key point: depth of proven policy in Florida sustainable nationally over two presidential terms is a better choice than another drama-plagued and by definition ineffectual presidency under the best of conditions.