How John McCain edged Mitt Romney among voters concerned about the economy?

[UWS]

How John McCain edged Mitt Romney among Republican primary voters who described the economy as the most important issue despite Romney's business experience?

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#NHREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#SCREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#FLREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#CAREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#ALREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#CTREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#GAREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#ILREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#MOREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#NJREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#NYREP

http://www.cnn.com/ELECTION/2008/primaries/results/epolls/index.html#OKREP

[Mr. Morden]

Romney won voters who were wealthier and happier with Bush.  McCain won voters who were less wealthy and less happy with Bush.  That’s because Romney ran as a generic R and McCain ran as a “maverick”.  Just look at the NH exit poll.  GOP primary voters split down the middle on whether they had a positive or negative opinion of the Bush administration, and Romney won the former while McCain won the latter.

Voters who were less happy with Bush were more likely to say that the economy was a problem.  Thus, McCain won them rather than Romney.