The race to the Republican presidential nomination remains up in the air. Watch CNN.com Live for all the latest news and views from the campaign trail.
Today's programming highlights...
8:30 am ET - Affordable Care Act supporters briefing - The Supreme Court hears arguments today on the legality of President Obama's health care reform plan. And while TV cameras are barred inside the high court, there will be plenty of action outside, with supporters holding a briefing, followed by a rally at 10:00 am ET.
12:40 pm ET - Romney in California - It's a somewhat quiet day on the campaign trail, as GOP hopeful Mitt Romney holds an event in San Diego. Rival Rick Santorum is expected to be outside the Supreme Court to express his opposition toward the Affordable Care Act.
1:30 pm ET - TSA screening hearing - With plenty of negative press abound regarding questionable TSA screening incidents, many may be wondering if the TSA is doing its job. Two House committees will discuss the issue this afternoon.
2:00 pm ET - GOP lawmakers discuss Affordable Care Act - Members of the Republican Policy Committee will hold a briefing on the Supreme Court's consideration of the Affordable Care Act's legality.
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