Rep. Darrell Issa has announced that he is expanding his investigation into IRS targeting of conservative groups to deal with alllegations that the tax agency put groups already tax exempt under additional scrutiny. The Hill: The IRS subjected conservative groups already granted tax-exempt status to additional scrutiny during the 2012 election cycle, House Oversight Committee Chairman Darrell Issa (R-Calif.) charged on Monday. Issa called on a Treasury watchdog already looking into the IRS to investigate the matter, and signaled he would expand his committee's probe into improper targeting of political groups given the new revelations. Rep. Elijah Cummings (D-Md.), the...