NEW : Barack McCain criticizes VP , statement from John McCain . Biden was preparing for the debate in Delaware on Monday . McCain 's campaign says Obama `` failed to lead '' Congress candidates ' debate is Thursday in Missouri , Missouri . Joe Biden , Joe Biden spending much of the week in debate prep mode .
NEW : Barack McCain criticizes VP , statement from John McCain . McCain 's campaign says Obama `` failed to lead '' Congress candidates ' debate is Thursday in Missouri , Missouri . Joe Biden , Joe Biden spending much of the week in debate prep mode .