U.S. Markets open in 6 hrs.

Leading Senate Democrat: IRS behavior intolerable

Stephen Ohlemacher and Alan Fram, Associated Press

FILE - In this Aug. 2, 2012, file photo, then-Internal Revenue Service Commissioner Douglas Shulman testifies on Capitol Hill in Washington. Shulman heads to Capitol Hill on May 21, 2013, giving lawmakers their first opportunity to question the man who ran the agency when agents were improperly targeting tea party groups. Lawmakers want to know what Shulman knew and when he knew it. They also want to know why Shulman didn’t tell Congress that agents had been singling out conservative political groups for additional scrutiny when they applied for tax-exempt status _ even after he was briefed. (AP Photo/J. Scott Applewhite, File)

WASHINGTON (AP) -- A leading Senate Democrat says the Internal Revenue Service's targeting of conservative groups was intolerable, and he is promising to get to the bottom of how it happened.

Senate Finance Committee Chairman Max Baucus made his remark Tuesday as his panel began Congress' second hearing on the extra scrutiny the IRS gave tea party and other conservative groups seeking tax-exempt status.

The Montana Democrat says his committee will follow the facts wherever they lead.

Scheduled to testify to Congress for the first time was former IRS Commissioner Douglas Shulman, who headed the agency for most of the period when it was improperly focusing on the conservative groups.