JANESVILLE, Wis.—Rep. Paul Ryan was an altar boy who attended Catholic school through the eighth grade, though his parents didn't insist that their four children integrate faith into their lives. Their Catholic life was as much about community and taking care of each other as it was about dogma.

"It was not forced upon us. It was exposed, and some of us embraced it more than others," said brother Tobin Ryan, who is five years older than Paul.

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