Republicans believe emails could shed light on possible IRS targeting of conservative groups . The House Oversight Committee is investigating the IRS's handling of applications for tax-exempt status from Tea Party and other groups. Former IRS official Lois Lerner is at the center of the email controversy .
Republicans believe emails could shed light on possible IRS targeting of conservative groups . The email probe is part of a larger DOJ investigation of agency targeting . Former IRS official Lois Lerner is at the center of the email controversy .