By Thomas McKinless

A tense House Judiciary Committee hearing was held Wednesday on the impeachment of IRS Commissioner John Koskinen, and it seems unlikely there will be a resolution this month. Koskinen fielded questions about a scandal — that the agency applied extra scrutiny to conservative groups that applied for tax-exempt status — that has badgered the IRS since before he became commissioner. How did this come about and what’s expected to happen next in Congress? Lindsey McPherson contributed.