J.D. Vance spoke with Vice President Kamala Harris on Tuesday afternoon, multiple sources familiar with the conversation told ABC News.

It was their first conversation since Vance was announced as Trump's running mate.

J.D. Vance spoke with Vice President Kamala Harris on Tuesday afternoon, multiple sources familiar with the conversation told ABC News.

The conversation was "brief and respectful," according to a source with knowledge of the call.

Vance and Harris said they are looking forward to debating each other, the sources said, but no specifics were discussed.

The Republican National Convention's second night has begun, and the theme is "Make America Safe Once Again."

Several speakers -- including former U.N. ambassador Nikki Haley and Florida Gov. Ron DeSantis -- are expected to take the stage.

There was a deadly police shooting Tuesday about a mile from the Republican National Convention in Milwaukee.

Witnesses told ABC7 Chicago that the victim is a man who lives in a park nearby. He reportedly got into an argument, and pulled out knives.

There was a Milwaukee police shooting today. A man was shot and killed by Columbus, Ohio police near the RNC in Wisconsin.

Police officers from out of town are in Milwaukee, helping during the convention.

They responded, and the man was shot.

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JD Vance returned to the RNC convention Tuesday afternoon and walked the floor.

He was accompanied by Donald Trump Jr., but did not answer shouted questions from the press.