Posted by Dan McLaughlin (Diary)

Monday, February 27th at 2:17 PM EST

Here’s why tomorrow’s Michigan primary is so important: it’s about establishment confidence in Mitt Romney and the last outside chance of getting another entrant in the race.

There are, as I’ve noted previously, a number of different types of “establishment” vs “grassroots” divides in the GOP, but you don’t have to have any particular definition of ‘establishment’ to recognize that Romney’s candidacy leans heavily on the support he draws from traditional ‘establishment’ or ‘insider’ sources: money from big-dollar fundraisers, endorsements from big-name elected officials, and covering fire from right-leaning journalists at major mainstream publications and conservative journals. Romney has depended, time and again, on his ability to get out of trouble by having the resources to go more negative than whatever opponent he’s targeting: more money to dump on negative ads and a bigger chorus of voices amplifying those attacks.

Aside from Mormon support – which is somewhat sui generis to Romney – some of Romney’s structural support comes from people who know him personally or identify with him as a fellow wealthy businessman; some comes from people who fear running a bold-colors conservative; and some comes from those who, whether or not they’d support a conservative in theory, fear Rick Santorum and Newt Gingrich as electoral liabilities, Santorum for his overly outspoken social conservatism, Newt for his long train of baggage. (It’s obviously Santorum represents a serious threat to Romney at present.)

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