Where are the leaders of the Republican party when their supporters are shouting racist slurs? They are silent.
The Tea Partiers are not a spontaneous uprising of disaffected citizens who are angry about bailouts. This is the base of the modern Republican party, and they are the same kind of people who were co-opted by the Republican "Southern Strategy" so many years ago.
The leadership of the Republican party can not condemn them because they NEED them to win their elections. They continue to dance with racists and bigots because that's who brought them to where they are today.