Well, of course he will, but here's the strategy angle you're failing to see.
The real threats to the Dem/RINO ruling class establishment are being attacked and undermined NOW. Long before the first primary votes are cast. There's an effort afoot to eliminate them from serious contention, leaving only the establishment's favorite sons to compete for the nomination.
Those favorite sons are Mitt and Newt. It's why you don't hear a peep out of the mainstream press about them. As you've already said, they won't be attacked until one of them has secured the nomination, and that is the simplicity of the left's master plan to re-elect Obama.
As far as they're concerned, the type of people who would really correct the system must be prevented from getting the nomination at all costs. Only their approved candidates will be allowed to run the full course of the race.
The press isn't going after all of our candidates. Some of them are no threat, because they're already so far out of contention. No need to waste resources on them. They're only going after those candidates who have high poll numbers, and who don't meet with their approval.
So ask yourself. With Newt and Mitt in the top three, why aren't they sustaining any attacks from the left, as Herman Cain is?
BS. The Establishment is pulling for Romney. The MSM and the Dems despise Newt. He's the most conservative Speaker in the history of the House and they don't want him anywhere near the halls of power again.
The media took on Gingrich when his staff quit. They wrote him off, they attacked him for lack of organization and focus and for having too much credit at Tiffany's. His divorces and peccadilloes are well-known and of no concern to the MSM, in part because his enemies within "conservative" circles all over the blogosphere are hammering him with the topic daily. It's as though he cheats on his ex-wives every day of the year.
The press pretty much shot their wad with Gingrich when his staff left. As I said, he only recently attained front-runner status and they'll only start hammering him again if they think it'll serve their purposes. Newt does well when attacked by the left because he can counterpunch. They're gun-shy about him and they've been reminded of his resilience in the face of their criticism over the last several months.