Republican presidential nominee tells supporters at a rally in Iowa: "If we don't win this election, we will never have a shot – this is it."

In 1890, long before it published photographs or crossword puzzles or won a Pulitzer Prize, The Arizona Republic was called The Arizona Republican.

The US newspaper later changed its name, but not the political slant of its editorial page.

For 126 years, the Republic has endorsed candidates for president of the United States. For 126 years, they've always been Republicans.

Jonathan Ernst/Reuters The Arizona Republic wrote: "When the president of the United States speaks, the world expects substance. Not a blistering tweet."

That changed on Tuesday.



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In a historic first, the newspaper's editorial board announced online their unequivocal endorsement of Democratic candidate Hillary Clinton – and eviscerated her opponent, Republican candidate Donald Trump, along the way.

The state's largest newspaper acknowledged its own bold and uncharacteristic move in the editorial:

"Since The Arizona Republic began publication in 1890, we have never endorsed a Democrat over a Republican for president. Never.

"This reflects a deep philosophical appreciation for conservative ideals and Republican principles.

Brian Snyder/Reuters While the paper acknowledged that Hillary Clinton has made "serious missteps", it called her the "superior choice".

"This year is different.

"The 2016 Republican candidate is not conservative and he is not qualified.

"That's why, for the first time in our history, The Arizona Republic will support a Democrat for president."

Jonathan Ernst/Reuters Donald Trump has "deep character flaws" and does not "grasp our national ideals", said the editorial.

The Republic isn't the first traditionally conservative newspaper to deviate from historical norms.

Earlier this month, the Dallas Morning News threw its support behind Clinton, the first democratic presidential candidate it had endorsed since before WWII. The Cincinnati Enquirer, which has supported Republicans for president for nearly a century, endorsed Clinton, as did the Houston Chronicle.

Several have even decided to endorse long-shot Libertarian candidate Gary Johnson – who didn't even qualify for the general election debates – instead.

AFP Americans react to the fiery first US presidential debate between Donald Trump and Hillary Clinton.

Trump, as of this writing, has received no endorsements from major publications since the primary season.

Like most of those non-traditional endorsements for Clinton, the Republic acknowledged she has made "serious missteps".

The newspaper critiqued her use of private email servers while serving as secretary of state, and wrote that although there was no evidence of wrongdoing, Clinton should have created a firewall between herself and her foundation to prevent the concern that donors were trying to buy access.

REUTERS The Democratic and Republican presidential nominees skewer each other at Hofstra University in the first of three presidential debates, with heated moments raising questions about "temperament."

"Yet despite her flaws," the newspaper wrote, "Clinton is the superior choice."

The editorial continues: "She does not casually say things that embolden our adversaries and frighten our allies. Her approach to governance is mature, confident and rational.

"That cannot be said of her opponent.

"Clinton retains her composure under pressure. She's tough. She doesn't back down.

"Trump responds to criticism with the petulance of verbal spit wads.

"That's beneath our national dignity.

"When the president of the United States speaks, the world expects substance. Not a blistering tweet."

The editorial praises Clinton's diplomatic work with foreign countries friendly and not, and cites her long record of public service – as a senator, secretary of state and first lady – as evidence of her commitment to furthering the nation's collective ideals. They touted her temperament, an area in which, just 24 hours prior at the first 2016 presidential debate, Trump proclaimed he was far superior. The Republic disagreed.

They wrote: "Trump mocked a reporter's physical handicap. Picked a fight with a Gold Star family. Insulted POWs. Suggested a Latino judge can't be fair because of his heritage. Proposed banning Muslim immigration.



"Each of those comments show a stunning lack of human decency, empathy and respect. Taken together they reveal a candidate who doesn't grasp our national ideals."

Trump, the editorial says, "hangs scapegoats like pinatas and invites people to take a swing".

The endorsement criticises his insults toward women as "not just good-old-boy gaffes", but "evidence of deep character flaws". It condemns his views on immigration, an issue the state of Arizona takes particularly seriously because of its close proximity to Mexico.

The editorial board likely anticipated a backlash from its conservative readership when it penned the endorsement, making a point to acknowledge the dread many Republicans might feel in this election. Many GOP voters understand Trump's flaws, they wrote, but "shudder" at the thought of another president Clinton – especially when it comes to nominating justices to the Supreme Court.

"We get that," the board wrote. "But we ask them to see Trump for what he is – and what he is not. Trump's conversion to conservatism is recent and unconvincing."

When the Republic published its endorsement online Tuesday night, it posted the article to Facebook. Within hours, the comment thread was flooded with angry responses, threats to cancel subscriptions and confessions of perceived betrayal from the traditionally conservative editorial board.

The post has been shared some 3,000 times on Facebook.