Donald Trump won another key primary state

Election Heads West: Trump, Clinton Hope to Scoop Up Delegates

Republican presidential frontrunner Donald Trump just won another key state, making his path to his party's nomination even clearer.

The Associated Press and Fox News projected on Tuesday that Trump would win the Arizona primary.

The victory adds 58 delegates to the 681 Trump had when he entered Tuesday's contests. Candidates need 1,237 needed to clinch the GOP nomination.

Trump campaigned hard in Arizona, where his hard-line immigration stance resonated with many of the state's Republican voters.

Click through images from the Arizona, Idaho, and Utah primaries:

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Arizona, Idaho, Utah Primaries
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Donald Trump won another key primary state
PROVO, UT - MARCH 22: A Ted Cruz sign sits on a table as voters line up to attend the Utah Republican caucuses at Wasatch Elementary on March 22, 2016 in Provo, Utah. The Republicans have 40 delegates and Democrats 37 delegates at stake in Utah. (Photo by George Frey/Getty Images)
PROVO, UT - MARCH 22: Voters sign in for the Utah Republican caucuses at Wasatch Elementary on March 22, 2016 in Provo, Utah. The Republicans have 40 delegates and Democrats 37 delegates at stake in Utah. (Photo by George Frey/Getty Images)
PROVO, UT - MARCH 22: Voters line up to attend the Utah Republican caucuses at Wasatch Elementary on March 22, 2016 in Provo, Utah. The Republicans have 40 delegates and Democrats 37 delegates at stake in Utah. (Photo by George Frey/Getty Images)
PROVO, UT - MARCH 22: Voters look for their district on a map for the Utah Republican caucuses at Wasatch Elementary on March 22, 2016 in Provo, Utah. The Republicans have 40 delegates and Democrats 37 delegates at stake in Utah. (Photo by George Frey/Getty Images)
PROVO, UT - MARCH 22: Voters sign up to attend the Utah Republican caucuses at Wasatch Elementary on March 22, 2016 in Provo, Utah. The Republicans have 40 delegates and Democrats 37 delegates at stake in Utah. (Photo by George Frey/Getty Images)
PROVO, UT - MARCH 22: A voter looks on-line to see where to report for the Utah Republican caucuses at Wasatch Elementary on March 22, 2016 in Provo, Utah. The Republicans have 40 delegates and Democrats 37 delegates at stake in Utah. (Photo by George Frey/Getty Images)
PROVO, UT - MARCH 22: A record number of voters from precinct 36 attend the Utah Republican caucuses at Wasatch Elementary on March 22, 2016 in Provo, Utah. The Republicans have 40 delegates and Democrats 37 delegates at stake in Utah. (Photo by George Frey/Getty Images)
PROVO, UT - MARCH 22: Vern (L) and Rhonda Sanford prepare to print out a same day ballot to vote before the Utah caucuses tonight at 7pm on March 22, 2016 in Provo, Utah. The Sanfords both voted for Republican presidential candidate Sen. Ted Cruz (R-TX). (Photo by George Frey/Getty Images)
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He had the local support of divisive public figures like former Arizona Gov. Jan Brewer and Sheriff Joe Arpaio, both famous for their attempts to use aggressive tactics to curb illegal immigration.

In the days leading up to the contest, Trump frequently name-dropped Arpaio during interviews, touting Arpaio's record on immigration and praise for Trump's candidacy.

"I have great respect for Sheriff Arpaio," Trump said in a statement after Arpaio endorsed him. "We must restore law and order on the border and respect the men and women of our police forces. I thank him for his support of my policies and candidacy for President."

Utah also held a GOP primary contest Tuesday, but the state won't report its results into later into the night. Trump's main primary rival, Sen. Ted Cruz, is expected to do well there.

The results move Trump a step closer to a potential general election matchup with former Secretary of State Hillary Clinton, who won the Arizona Democratic primary Tuesday evening.

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