TUCSON — Representative Gabrielle Giffords was distressed when the glass front door of her district office here was shattered by a kick or a pellet gun last March, an act of vandalism that took place hours after she joined Democrats in passing President Obama’s health care bill. “Things have really gotten spun up,” she told a television interviewer the next day.
But tensions have long run high in the Eighth Congressional District of Arizona, a classic swing district that shares a 114-mile border with Mexico. Protesters chained themselves to the desks of Ms. Giffords’s Republican predecessor, Jim Kolbe, 12 years ago. And over the past year, Ms. Giffords struggled in a brutal re-election campaign during which her opponent appeared in a Web advertisement holding an assault weapon. The district has become a caldron of divisions over government spending,immigration, health care and Barack Obama.
Today, the Eighth District stands apart as one of the most emotionally and politically polarized in the nation.
The rampage on Saturday that left six dead and Ms. Giffords gravely wounded may prove to be an isolated act of violence by a mentally disturbed man. The suspect attended at least one of Ms. Giffords’s town meetings before the event Saturday.
Still, the shootings came after a disconcerting run of episodes in this district of mountains and desert, raising temperatures here in a way that some that some of Ms. Giffords’s friends argue fed an atmosphere that might encourage violence.
Several of them pointed back to the smashed door of her district headquarters at 1661 North Swan Street last March as a turning point; a time when a cloud of unease settled over Ms. Giffords and her staff.
