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Is fracking making people sick? The question has ignited a national debate. A proposed study in northern Pennsylvania could help resolve the issue. By mining more than 10 years' worth of patient records, researchers hope to better understand the potential impact of hydraulic fracturing on health.

The conservative known for his role in the 2008 presidential election is taking on a veteran Democrat in a new Ohio district. An analyst calls the race a microcosm of "the culture wars that are going on in the country right now." Most of the candidates' funding is coming from outside the state.

While U.S. adults have relatively uniform microbe colonies in their guts, adults in Malawi and Amazonia have much more diverse populations. Scientists are still struggling with why that is and what it means.

For several election cycles, the presidency has been won or lost based on suburban voters in several key swing states. And some political observers believe that President Obama took the calculated risk that supporting gay marriage rights will boost his campaign in these all-important counties.

A new study shows eligible voters who favored whites over blacks- either consciously or unconsciously- also favored Republican candidates relative to Barack Obama. Psychologist Anthony Greenwald discusses the results and why racial attitudes continue to predict voter preference in 2012.

Now, once again the country is on the verge of losing its bailout funds.

Some two dozen Americans have given $1 million or more to superPACs in the 2012 presidential campaign. The vast majority of them have been Republicans, but Jeffrey Katzenberg, the head of DreamWorks Animation, has chipped in $2 million to help out the superPAC supporting President Obama.

Balfour was convicted in the murder of the Oscar winner's mother, brother and nephew.

And to all the moms: An early happy mother's day!

Audie Cornish speaks with Gregory Zuckerman about one of the men behind JPMorgan Chase's $2 billion loss. He's a special writer for The Wall Street Journal and author of The Greatest Trade Ever.