Republican presidential candidate Rick Santorum has appeared outside the Supreme Court, where the justices are hearing arguments over whether President Barack Obama's health care overhaul is constitutional.
Santorum pressed his own argument that he's the best candidate to challenge Obama on the health care issue in the fall.
He says GOP rival Mitt Romney essentially is disqualified because he put in place a similar law in Massachusetts when he was governor, including a requirement that all residents buy health insurance.
A similar so-called "individual mandate" in Obama's law has drawn the ire of conservatives, including Santorum.
Appealing to conservatives, Santorum said: "If you really want Obamacare repealed there's only one person who can make that happen."
Santorum won Louisiana's primary Saturday but continues to lag behind Romney.
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