IRS official Lois Lerner at a House Oversight and Government Reform Committee hearing on Capitol Hill on Wednesday, May 22, 2013. (AP Photo/Carolyn Kaster)

(CNSNews.com) - A newly discovered email exchange from Lois Lerner's official IRS email account "directly demonstrates Ms. Lerner's deep animus towards conservatives, which she refers to as '---holes,'" House Ways and Means Committee Chair Dave Camp wrote in a letter to Attorney General Eric Holder on Wednesday.



In that Nov. 9, 2012 email, Lerner further suggests that conservatives will ruin the country: "So we don't need to worry about alien teRrorists (sic). It's our own crazies that will take us down," she wrote.



Camp (R-Mich.) told Holder the email "shows that Ms. Lerner's mistreatment of conservative groups was driven by her personal hostility toward conservatives."



Camp said he also has discovered that Lerner used her personal email to conduct official business,including confidential tax return information, and he once again urged the Justice Department to ramp up its investigation:



"While the Committee has not seen any evidence of a serious investigation by your Department, it is my sincere hope that in light of this new, strong evidence that you immediately begin aggressively investigating this matter or appoint a special counsel."



Camp warned that failure to do so "will only further erode public trust" in the Internal Revenue Service and the Justice Department.

Ways and Means is one of three congressional committees investigating the way the IRS, during Lerner's tenure, handled groups seeking tax-exempt status. The IRS admits that conservative groups were singled out for inappropriate scrutiny and delay before the 2012 election.