Rochester, Minnesota (CNN) – Presidential candidate Rick Santorum, hoping for some much needed momentum heading into the next round of primaries and caucuses, leveled some of his harshest criticisms yet at Mitt Romney over the issue of healthcare and the repeal of “Obamacare.” Speaking near the campus of the Mayo Clinic, Santorum said the former Massachusetts governor was “dead wrong” and “the worst possible person” to put up on what he called the “most fundamental issue” of the campaign. “I really don’t find any legitimate reason why [Romney] would oppose [Obamacare], because the plan he put together in Massachusetts is in fact Obamacare on the state level,” Santorum said during a strongly worded healthcare-centered speech, adding that Romney “should not be the nominee of our party.” (Excerpt) Read more at politicalticker.blogs.cnn.com …