File photo shows Alaska Governor Palin waving in front of her daughter Bristol and son Trig as Republican presidential candidate McCain looks on at a campaign event in Dayton

 
File photo shows Alaska Governor Palin waving in front of her daughter Bristol and son Trig as Republican presidential candidate McCain looks on at a campaign event in Dayton
Alaska Governor Sarah Palin (C) waves in front of her daughter Bristol (2nd R) and son Trig (R) after being introduced as the Republican vice-presidential running mate as U.S. Republican presidential candidate Senator John McCain (R-AZ) looks on at a campaign event in Dayton, Ohio in this August 29, 2008 file photo. Bristol, the 17-year-old daughter of Republican vice presidential candidate Sarah Palin is pregnant, Palin said on September 1, 2008 in an announcement intended to knock down rumors by liberal bloggers that Palin faked her own pregnancy to cover up for her child. REUTERS/Matt Sullivan/Files (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)