By Sarah N. Lynch WASHINGTON (Reuters) – The U.S. Justice Department on Thursday tapped federal prosecutor Kevin A. Chambers to lead the department’s efforts to help investigate fraudsters who used the COVID-19 pandemic as an excuse to bilk government assistance programs. Chambers’ appointment as the Justice Department’s chief pandemic fraud prosecutor was previewed by President Joe Biden during last week’s State of the Union address. Chambers currently serves as the Associate Deputy Attorney General, according to his LinkedIn profile. He worked as an assistant U.S. Attorney from 2010 through …