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Weiner's next step?

Can Rep. Anthony Weiner (D-NY) survive an ethics investigation and calls for his resignation?

The former head of the Democratic Congressional Campaign Committee, Martin Frost, has some advice. Although the context is “totally different,” Frost said, "A very interesting solution to this would be to urge him to do what Phil Gramm did," referring to the former Texas politician.

Frost cited the then-Texas Democrat's decision to resign from his congressional seat and run as a Republican in the special election for the seat he vacated. 

"If Anthony Weiner wants to be vindicated, that would be an interesting path to follow... [He could ] say I'll run in the special election. Let the voters of my district make a decision on this matter."

But vindication may not be possible if Weiner loses his seat to redistricting.

"When New York loses two seats, which is the case here, one is taken upstate and one is taken out of the city. It may be the legislature says, 'OK, this is the seat we eliminate in the city,'" Frost said on MSNBC's "Andrea Mitchell Reports."

Weiner's immediate challenge may be to face a House ethics investigation. On Tuesday, House Minority Leader Nancy Pelosi sent a letter to House Ethics Committee Chair Jo Bonner, urging the committee to investigate the New York congressman's conduct -- a day after Weiner admitted to sending lewd photos to women via social media websites.

Though "the Ethics Committee could very well seriously reprimand him," Frost says Weiner will not face expulsion from the House.

"You don't get expelled for anything short of committing a felony," said Frost, the former Texas congressman.