Washington Examiner has endorsed Romney:
Republican voters seem to be engaging in willful amnesia about what is euphemistically called Gingrich’s “baggage.” They shouldn’t: It would be used against him in ugly ways in a general election campaign.
National Review likewise rules out Gingrich:
If he is the nominee, a campaign that should be about whether the country will continue on the path to social democracy would inevitably become to a large extent a referendum on Gingrich instead. And there is reason to doubt that he has changed. Each week we see the same traits that weakened Republicans from 1995 through 1998:
Josh Marshall marks the moment:
This morning we’ve officially reached the end of the Newt Surge and — whether the data support the thesis or not — moved on to the Establishment Counterattack. After a week or so of stunned silence, the Republican establishment, under the very uneasy leadership of Mitt Romney, has roused to the unavoidable truth (now backed up by hard data) that nominating Newt Gingrich means all but giving up any chance of taking the presidency in 2012.