After bitter debate, Romney and Santorum eye Mich. (AP)

[unable to retrieve full-text content]AP - A bitter and often personal debate behind them, Republicans Rick Santorum and Mitt Romney are shoring up their campaigns in different ways ahead of a series of crucial presidential primaries.

Source: http://us.rd.yahoo.com/dailynews/rss/politics/*http%3A//news.yahoo.com/s/ap/20120223/ap_on_el_pr/us_gop_campaign

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