Former President Donald Trump's campaign is claiming it was hacked by "foreign sources" with the intent to interfere in the upcoming election.

The Trump campaign statement cited a report published by Microsoft on Friday, which said, "In June 2024, Mint Sandstorm—a group run by the Islamic Revolutionary Guard Corps (IRGC) intelligence unit—sent a spear-phishing email to a high-ranking official of a presidential campaign from a compromised email account of a former senior advisor. The phishing email contained a fake forward with a hyperlink that directs traffic through an actor-controlled domain before redirecting to the listed domain."

Microsoft does not identify the presidential campaign in its report. Microsoft has also not responded to ABC's request for more information.

Outside of the Trump campaign statement, ABC News has not confirmed the campaign was hacked by foreign sources with the intent to interfere in the election.

Vice President Kamala Harris and Gov. Tim Walz dropped by the North Phoenix coordinated campaign office on Friday to meet with volunteers making signs.

"Aw, Momala," Harris said reading a sign that made mention of her step kids' nickname for her.

The vice president laughed when she saw on person's "Coconut > Orange" sign.

"We just wanted to stop by to say thanks, guys," she said.

The duo took a selfie in front of a large "Kamala and Coach" sign at the end.

They then invited those in attendance to join them in the motorcade to the rally.

On the tarmac, a reporter asked Walz if he had spoken with Sen. JD Vance. He did not answer.

-ABC News' Gabriella Abdul-Hakim, Fritz Farrow and Will McDuffie

Former President Donald Trump's plane was diverted Friday making a landing in Billings, Montana, due to a mechanical issue, an airport spokesperson and sources told ABC News.

Trump was en route to a campaign event at Brick Breeden Fieldhouse in Bozeman, Montana, scheduled for later in the night.

The situation was not an emergency, sources close to the former president told ABC News.

The sources and airport spokesperson say Trump continued to Bozeman on a smaller private jet.

-ABC News' John Santucci, Katherine Faulders, Luke Barr and Clara Mcmichael

Former Vice President Mike Pence reiterated Friday that he would not vote for his successor despite not supporting former President Donald Trump.

"Let me go on the record here at the gathering: I could never vote for Kamala Harris as president of the United States, or Tim Walz, as her running mate. Period," Pence said during an on-camera interview with conservative radio host Erick Erickson.

Pence defended his decision to not support Trump, citing several issues including "marginalizing the right-to-life in our party, as we saw on the national platform."

"I cannot endorse President Trump's continuing assertion that I should have set aside my oath to support and defend the Constitution and acted in a way that would have overturned the election in January of 2021," Pence added.

The former vice president did say he was grateful that Trump was not seriously hurt during the attempted assassination during a rally in Pennsylvania last month.

"Karen and I, we were in a plane, we had just landed, and I had got a text from someone watching it in real time. It took my breath away," he said, referring to his wife. "I truly admired the way the president stood up and raised his fist and walked off that stage."

-ABC News' Brittany Shepherd