Democrat Raúl Grijalva has won a seventh term representing Southern Arizona in Congress.
Grijalva winning in all parts of the district except Maricopa County.
Saucedo Mercer has tried to make abortion and religion a top issue.
Outside spending in 2 tight contests has exceeded $13 million since primary.
Candidates differ on border security and the fight against the Islamic State.
Grijlava vs Saucedo Mercer rematch might not include a live debate.
Grijalva said deporting working parents shouldn't be a high priority.
Saucedo Mercer: "It’s easy to play Santa Claus with someone else’s money."
With no primary opposition, Congressional candidates prepare for general election battle.
"Fact that Barack Hussein Obama's father was a Muslim makes him one."
Handout from the Gabriela Saucedo Mercer CD3 campaign, distributed in 2014
Congressional candidates continue to pull in donations weeks before the Aug. 26 primary.
Political news and gossip here in the Old Pueblo.
3 chances to meet people who want to represent you in Congress
Polak thanked supporters in a withdrawal announcement on Facebook.
Republican-turned-Libertarian candidate Miguel Olivas announced on Facebook Monday that he will not run for Congress in Arizona’s District 3.
Republican-turned-Libertarian candidate Miguel Olivas announced on Facebook Monday that he will not run for Congress in Arizona's District 3.
The Republican candidate in Arizona's Congressional District 3 race posted on Facebook a gruesome photo depicting a man posing with several decapitated heads and she called for "eye for an eye" treatment for terrorists.
The Congressional District 3 Republican primary race was jumbled this week as one candidate dropped out and another jumped in.
There have been major changes in the Congressional District 3 race scene since Wednesday’s filing deadline.