Despite House Majority Leader Eric Cantor (R-VA)’s 2010 pledge of a “zero-tolerance policy” for ethical violations, the number of House Republicans under scrutiny for ethical lapses continues to grow. Yesterday, the non-partisan Citizens for Responsibility and Ethics in Washington filed a complaint with the Federal Election Commission against Rep. Paul Broun (R-GA). The watchdog group alleges that Broun illegally hid the source of more than $300,000 in loans made to his 2007-2008 campaign. Like with his colleagues under investigation, Cantor and the Republican leadership have made no effort to remove Broun from his post as chairman of the Committee on Science, Space and Technology’s Subcommittee on Investigations and Oversight. Broun’s office did not respond to a request for comment on the allegation.