Homeland Insecurity: The IRS is diligent to a fault when it comes to vetting conservative groups applying for nonprofit status. But it's out to lunch when vetting employees posing security risks. While the Internal Revenue Service was investigating Tea Party patriots in the run-up to last year's presidential election, it dispensed with basic background checks and hired a convicted Islamist traitor as a high-level official. Mohammad Weiss Rasool, whom the FBI busted last decade for tipping off an al-Qaida terrorist suspect, reportedly now works for the deputy IRS chief financial officer as a financial management analyst, drawing a lucrative salary...