By David Shepardson WASHINGTON (Reuters) -Two U.S. House Democratic lawmakers on Friday asked Hertz Global Holdings, and Avis Budget Group to answer questions about rising rental car prices and higher industry profits. Representative Raja Krishnamoorthi, chairman of the Subcommittee on Economic and Consumer Policy, and Representative Katie Porter said both rental car firms appear to have used their market position to raise prices as expenses fell. They said in a statement they want documents and information by April 1 “from both companies explaining the increases in rental car prices despite f…