Just as the human costs mounted, the total financial costs also rose from the initial Bush Administration estimates of $50 billion to more than $400 billion total, most of it coming from the United States, but at least £4 billion from the United Kingdom.[24][25][26] As the war bill grew, many U.S. politicians, including some who supported the invasion, begun to argue its cost outweighed its benefits, and that it was jeopardizing the preparedness of the U.S. military. For example, on March 29, 2007, Nebraska Senators and longtime rivals Chuck Hagel (R-NE) and Ben Nelson (D-NE) released a joint statement saying that "there is now a 'significant' risk that the United States military will not be able to respond to an emerging crisis."[27][28]