Republican presidential candidate, Sen. John McCain, R-Ariz. , center, laughs while speaking with former Gov. Thomas Kean, R-N.J. , left, and Sen. Joe Lieberman, I-Conn. , at Liberty Science Center at Liberty State Park on Friday, May 9, 2008, in Jersey City, N.J. AP Photo logo AP Photo 18 months ago

Republican presidential candidate, Sen. John McCain, R-Ariz. , center, laughs while speaking with former Gov. Thomas Kean, R-N.J. , left, and Sen. Joe Lieberman, I-Conn. , at Liberty Science Center at Liberty State Park on Friday, May 9, 2008, in Jersey City, N.J.