Genetics: Why You’re Really Going to the Stewart/Colbert Rally

Here's what we're checking out today:

"Liberal" Gene? Researchers are suggesting that the gene DRD4, which had previously been linked to risk-taking behavior, also makes people more likely to be liberal, the Washington Post's Rob Stein reports.  Admit it: biology, not free will, is driving you to the Stewart/Colbert rally this weekend.

Nutrition: More evidence for the ever-growing mountain of studies showing that sugary drinks like Coke can significantly raise the risk of diabetes. In this study, even one or two sweetened drinks a day can raise by 25 percent your risk of Type 2 diabetes, U.S. News and World Report's Hanna Dubansky writes.

Health Reform: Health insurers are blaming health reform for rising premiums. NPR's Julie Rovner cries foul.

Medical Marijuana: How are nursing homes dealing with medical marijuana? Very, very carefully, report Nushin Rashidian and Alyson Martin of the New York Times.