sentences:  Lott has advocated government deregulation of various areas, and has also been published in the popular press taking positions in support of the U.S. Republican Party and President George W. Bush on topics such as the validity of the 2000 Presidential Election results in Florida.On April 10, 2006, John Lott filed suit for defamation against Steven Levitt and HarperCollins Publishers over the book "Freakonomics" and against Levitt over a series of emails to John McCall.In the book "Freakonomics", Levitt and coauthor Stephen J. Dubner claimed that the results of Lott's research in "More Guns, Less Crime" had not been replicated by other academics.