2:44 p.m.: There is a large group of protesters on Pennsylvania Avenue in front of the White House.
U.S. Park Police say they expect to arrest about 100 of them for "failure to obey a lawful order.
The group has a permit, but some of the protesters aren't following the rules said a park spokesman.
They are protesting mountain top mining.
A large bus was brought in, in anticipation of arrests.