Second gentleman Doug Emhoff called Minnesota first lady Gwen Walz to welcome her to the team, sharing a video on X on Tuesday afternoon.

"Holy smokes. Thank you for taking my call. That's so considerate. Thank you," Walz said.

"So just like Dr. [Jill] Biden was there for me who had been through it, and I've been through it, I'm gonna be there for you. We're gonna do this together," Emhoff said.

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

Gov. Tim Walz will tout Vice President Kamala Harris' history as a prosecutor, senator and vice president at their joint rally tonight in Philadelphia, according to excerpts from his speech that were released ahead of the event.

"She took on predators and fraudsters, took down transnational gangs, stood up against powerful corporate interests, she's never hesitated to reach across the aisle if it meant improving people's lives. And -- she brings joy to everything she does," the excepts read.

The governor is also expected to speak about his experiences from his days as a teacher to legislating as an elected official.

"These same values I learned on the family farm and tried to instill in my students, I took to Congress and the state capital, and now, Vice President Harris and I are running to take them to the White House," the excerpts read.

"Donald Trump -- he sees the world differently. He doesn't know the first thing about service -- because he’s too busy serving himself," the excerpts read.

-ABC News' Gabriella Abdul-Hakim

Tim Walz said during the VP vetting process that he had never used a teleprompter before, according to source familiar.

The governor practiced using one before his remarks tonight to be comfortable using it during the joint rally with Kamala Harris in Philadelphia, according to the source.

CNN first reported the teleprompter detail.

-ABC News' Selina Wang

Minnesota Gov. Tim Waz has arrived in Philadelphia ahead of his rally tonight with Vice President Kamala Harris.

He posted a video to X and wrote, "Hello Philly!"

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