While Arizona House Democrats were introducing students who came to protest for gun control on March 14, a Republican state senator was shifting the blame for a mass shooting in Florida to Obama-era school disciplinary guidelines.

Arizona Republican Sen. Jeff Flake’s re-election race is becoming a case study in the GOP’s convulsions among the establishment, a furious base and angry donors.

If money is an indication of support, Donald Trump has a lot more of it in a tony north Scottsdale area than anywhere else in the country.

Republican hopeful Marco Rubio filed for Arizona’s presidential preference election, bringing the number of candidates who have qualified for the March 22 primary to five.

Spanish-language radio is fixated on the 2016 presidential campaign, sparked by Republican Donald Trump's caustic remarks about immigrants, mainly Mexicans, and a GOP field of contenders trying to out-duel each other on the contentious topic of overhauling immigration law.

Gov. Doug Ducey, elected last year with the help of a group linked to the Koch brothers, is headed to California this weekend to meet with them again along with some of their wealthy colleagues.

Republican presidential candidate Marco Rubio plans two speeches in Arizona today, one to the business community and another to a social conservative group that is a powerful force in the right-leaning state.

WASHINGTON (AP) — Prospects for comprehensive immigration legislation this year grew murkier on the eve of an all-out push by a coalition of business, religious and law enforcement to convince the House to overhaul the decades-old system.

A long-simmering feud between establishment Republicans and tea partyers broke into full view Thursday, with Sen. John McCain accusing younger colleagues of overplaying their hands and tempting Democrats to change Senate rules that protect the minority party.

WASHINGTON — Some feisty Republicans are challenging a claim widely held among GOP leaders that the party must support more liberal immigration laws if it's to be more competitive in presidential elections.