PHOENIX - The announcement that the FBI will not recommend criminal charges against Hillary Clinton will likely have "zero" impact on voters' opinions in Arizona, according to Michael O'Neil, a public opinion researcher with O'Neil Associates. Clinton is the Democratic party's presumptive presidential nominee.

"Democrats will declare this means vindication, the Republicans will cite the fact she made serious mistakes," O'Neil said Tuesday. "I don't see this having an effect on undecided voters."

The presumptive Democratic nominee leads Donald Trump in a RealClearPolitics average of recent polls, 42 percent to 40 percent. But Clinton's lead is considered statistically insignificant.

An April public opinion poll by Phoenix-based Behavior Research Center suggested Clinton would beat Donald Trump by seven percentage points.

The state chairman for the Donald Trump campaign said he hopes Arizona voters see Clinton's actions as damaging to her reputation, nonetheless.

FBI Director James Comey said Clinton was "extremely careless" in her handling of sensitive, highly classified information.

"How can we possibly trust the presidency to someone who doesn't understand how to keep top secret documents a secret?" asked Jeff Dewit, who is also serving as Arizona's State Treasurer.

The Arizona Democratic Party suggested the announcement will bring closure to the issue.

The party issued a statement that reads:

"We are pleased that the career officials handling this case have determined that no further action by the Department is appropriate. As the Secretary has long said, it was a mistake to use her personal email and she would not do it again. We are glad that this matter is now resolved."