Newt is certainly brilliant in many ways - as a single goal strategist and as a canary in a coal mine.
But he doesn't have the staying power to complete a task all the way through which was what we saw when he was Speaker. Once he had attained his goal of a Republican congress, he was unable to lead it.
He is thrilled by the chase, but can't continue to lead after the chase.
He is "scattered."
Those who entertain supporting him (and hopefully Newt himself) will remember how he was beat up in the '90s.
The MSM and the Democrat dirt machine will come after him with a full nuclear strike...