CBS sought the middle ground on fact-checking. Vance jumped into the gap.

It was a fact-checking flashpoint.

In a tense moment at Tuesday’s vice-presidential debate, Senator JD Vance of Ohio clashed with one of the CBS News moderators, Margaret Brennan, over whether the ground rules for the evening allowed her to clarify his comments about immigrants in his home state. The pair went back and forth, and Mr. Walz started to cut in, before the network ultimately cut off both of the candidates’ microphones.

The awkward exchange may have been a result of confusion more than anything else.

Click here to read more.