WASHINGTON (CNN) -- President Bush on Wednesday vetoed legislation expanding a children's health insurance program by $35 billion over five years. Kids pull wagons full of petitions this week asking President Bush not to veto insurance legislation. Bush exercised the veto at 10 a.m. ET before leaving the White House for a trip to Lancaster, Pennsylvania, to discuss the federal budget and taxes. Congress sent the legislation expanding the State Children's Health Insurance Program, or SCHIP, to the White House on Tuesday. snip It appears Congress lacks the votes to overturn Bush's veto...... the 265-159 vote on September 25 in...