03/28/2008 02:46 am ET | Updated May 25, 2011

Obama Backs Law Helping McCain

Sen. Barack Obama's campaign announced he would co-sponsor legislation introduced yesterday by his political ally Missouri Sen. Claire McCaskill to ensure that John McCain can become president, even though he was born in the Panama Canal Zone.

The issue of McCain's eligibility was raised in a New York Times article noting the constitutional requirement that a U.S. president be a "natural-born citizen" had never been fully defined.

Read more on Washington Post's The Trail