Original sentence: O'Reilly was registered as a Republican in Nassau County, New York, from 1994 to 2000, but he claimed it was not by choice, but a clerical misunderstanding when he registered
Edited sentence: Though he professed to have no party affiliation, O'Reilly was registered as a Republican in Nassau County, New York, from 1994 to 2000.When his  party registration was exposed, he claimed it was not by choice, but a clerical misunderstanding when he registered