DAVID GREENE, HOST:
Now, once Mitt Romney gets back to these shores, he's expected to announce in the coming weeks who will be his running mate. And one name that keeps popping up on short lists is John Thune, a 51-year-old senator from South Dakota.
NPR's David Welna chatted with some of the senators colleagues about the possibility of a Romney-Thune ticket.
DAVID WELNA, BYLINE: Utah freshman Republican Mike Lee is one of the most conservative members of the Senate. He's got strong Tea Party backing and, like John Thune, he's a man of the West. Mention the possibility of Mitt Romney teaming up with Thune, and Lee's eyes light up.
SENATOR MIKE LEE: I love John. He's articulate, passionate, collegial. I mean, I think he'd be great.
WELNA: A less conservative Republican and woman of the East, Maine's Senator Susan Collins points out that she and her GOP colleagues unanimously elected Thune to their leadership team.
SENATOR SUSAN COLLINS REPUBLICAN, MAINE: He has a good image for the party. He relates well to people who represent the more conservative wing of the party, as well as those of us who are more moderate. He gets along with everyone.
WELNA: Like Ohio Senator Rob Portman, another possible Romney running mate whom Collins also supports, the tall and rangy Thune is telegenic but decidedly low-key. That's fine with North Dakota Republican Senator John Hoeven. Thune, he says...
SENATOR JOHN HOEVEN: Knows his way around D.C. in terms of, you know, understanding how to get legislation passed. Knows, you know, all the people. And so I think he'd be great and he'd be very effective in terms of helping in a Romney administration.
WELNA: In other words, John Thune may well be what you'd call a Washington insider.
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WELNA: I catch up with Thune on the underground train that trundles senators from the Capitol to their office buildings, and I ask him about such a characterization.
SENATOR JOHN THUNE: Normally not a flattering, yeah, statement I think, probably.
WELNA: Are you a Washington insider?
THUNE: No, No. I mean, I think what they mean by that is it's somebody that understands - hopefully - had been here, you know, long enough to understand how the process works.
WELNA: Eight years ago, Thune won his Senate seat by beating Tom Daschle, who at the time was the Democratic leader. Thune told NPR then that Daschle had spent too much time in Washington.
THUNE: Tom has had 26 years in Congress, but he's not listening to us anymore and he's not leading the people of South Dakota.
WELNA: Thune has now spent about 26 years himself in Washington. He's been a Senate aide, a small-business administrator, a member of the House for six years and a lobbyist for South Dakota railroads. Once a Democrat, Thune says Ronald Reagan inspired him to switch parties.
THUNE: You know, I'm a conservative in my political beliefs. And, you know, sort of conservative when it comes to my Christian faith, so.
WELNA: And it seems to color Thune's politics. Here he is earlier this year after the Obama administration directed religious-affiliated institutions to provide contraceptive coverage in their health insurance.
THUNE: I think decisions like this are also decisions that move us more in the direction of the secularization of our country.
WELNA: These days, Thune is coy about whether he's a contender to be Romney's running mate.
THUNE: They have a process. You'll have to ask them all those questions. We're respectful of that in not - you know, I mean I'm not the person I guess to ask that. I think that's a question for the Romney campaign.
WELNA: A question the Romney campaign has yet to answer,
David Welna, NPR News, the Capitol.
(SOUNDBITE OF MUSIC) Transcript provided by NPR, Copyright National Public Radio.