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And, late last year, Mr. Silverman, 55, announced he was pulling the lever for Tom Tancredo over challenger Mr. Hickenlooper, a Democrat, for governor as well as for Republican challenger Ken Buck over the incumbent Democrat, Sen. Michael Bennet.

“I struggled with it,” Mr. Silverman said of the decision, citing Mr. Hickenlooper’s unwillingness to engage the issues in venues like their show and Mr. Bennet’s “dirty” campaign tactics. “I have to be true to myself. That’s what people put me on the radio to do, to express my honest opinion, not my phony, ratings-driven opinion.”

Mr. Silverman honed his broadcasting skills by providing legal commentary on a number of high-profile Colorado cases with a national scope, such as the JonBenet Ramsey killing.

He was already a fan of his future partner, who had a solo radio show long before adding a co-host into the mix. Mr. Silverman would often bring a transistor radio to the golf course so he wouldn’t miss one of Mr. Caplis‘ broadcasts.

Mr. Caplis invited Mr. Silverman onto his radio show, and the two clicked. When they butted heads over accusations that Los Angeles Lakers basketball star Kobe Bryant had raped a woman in an Eagle, Colo., hotel, people took notice.

“I saw the case was weak and was going to fall apart. Dan disagreed. We started arguing about it, and people liked it. And [radio] management liked it,” Mr. Silverman recalls.

Both contend radio management allows them to say what they please and never asks them to spice up their arguments for the sake of ideological battles.

“I don’t think it would work if I tried to make stuff up,” Mr. Silverman said.

During a recent broadcast devoted to the case of the racy videos made by Navy Capt. Owen Honors, the hosts look like the lawyers they are during the day.

Each dressed impeccably, with Mr. Caplis wearing a sharp vest and Mr. Silverman’s tie roguishly askew. Their studio is spotless, save their laptops, which they consult throughout the show to research news or read listener e-mails.

“That’s why I love this issue; it’s mixing everybody up,” Mr. Silverman said with clear delight, gesticulating as if cameras were catching him in action. The two tear into the captain’s story for a full three hours, examining it from every possible angle as callers flood the studio lines.

Mr. Caplis‘ smooth baritone complements his on-air partner’s voice, a raspy instrument leavened by a salty sense of humor. Mr. Silverman is quick with a joke, often trying to rile his partner with something mildly provocative. Mr. Caplis plays the starched-shirt conservative to a T, avoiding sexual banter in favor of flyover-country-approved puns.

Mr. Silverman’s ability to switch sides on ideological issues won’t necessarily hurt the program’s left-right appeal, said Mr. Harrison, of Talkers Magazine.

“It wouldn’t ruin the show if they started agreeing with each other,” he said. “As long as they remain true to their core values and intellect, that’s what their listeners expect of them.”

Being courteous never blunts the force of one of Mr. Caplis‘ opinions.

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