Incumbent Democrat Ed Pastor considered a run for the U.S. Senate but decided against it .
In accordance with the redrawn boundaries , most of the 4th district became the 7th district and remained the most Democratic district in Arizona .
Incumbent Democratic Ed Pastor considered a run for the U.S. Senate but decided against it .
In accordance with the redrawn boundaries , most of the 4th district became the 7th district and remained the most Democratic district in Arizona .