Senate staffer beaten for her investigation?

The FBI and Capitol Police are investigating the vicious attack of a top Senate staffer at her home last week amid concerns that the assault might be related to her work on the Finance Committee. ....

Emilia DiSanto, chief investigator for committee Chairman Chuck Grassley (R-Iowa), arrived at her suburban Virginia home after work Wednesday about 6:30 p.m. As she was unloading belongings from her car, a 6-foot-1-inch white man dressed in black struck her repeatedly with an unidentified object believed to be a baseball bat.

The attack on DiSanto came two days before a bomb threat caused alarm at an Iowa veterans home where Grassley was scheduled to appear. ....

Grassley is known for his aggressive oversight of the public and private sector. Over the past year, he has scrutinized healthcare fraud, organ-donation procedures used by hospitals, drug-safety matters and the use of nonprofit groups related to former lobbyist Jack Abramoff.