Marketplace: Why equal time for candidates may not be so equal

The FCC requires individual broadcast stations, not networks or cable channels, to offer equal time — or rather equal opportunity — to competing candidates. But there are limitations. For instance, the rule doesn't apply to news, such as an appearance on "60 Minutes" or "Entertainment Tonight," said Meredith McGehee of the Campaign Legal Center.

"Where you can kind of draw the line is the difference between a scripted appearance and an interview appearance," she said.

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