With working class roots and a strong background in foreign policy, Sen. Joe Biden brings a lot to the table for the Democratic presidential ticket. But he’s also a pro-abortion Catholic–a fact some analysts believe is bound to touch off heated debate among the very constituents Democrats are working so hard to attract.

By selecting a Pennsylvania-born Catholic as his No. 2, [Barack] Obama is betting the potential rewards–including swaying elusive lunch-pail Catholics in the Midwest–outweigh the risks.

Catholics have been a swing vote for almost 40 years. Polls show white Catholics, who account for nearly one in five U.S. voters, evenly divided between Obama and Republican John McCain. McCain is leading among Catholics in battleground states Ohio and Florida.

“Having Biden on the ticket covers the Catholic base,” said David Gibson, a Catholic journalist and author. “But anytime you pick a Catholic, it’s also courting controversy.”

What impact do you think Biden’s Catholic faith will have on Obama’s bid for the presidency–is it a risk or a reward?