ROLL CALL: Freedom Caucus Forms ‘Fight Club’ in House.

Six months after the House Freedom Caucus was founded, it’s still unclear what exactly it is — or will be — beyond two key characteristics: its commitment to secrecy and to being a thorn in the side of House Speaker John A. Boehner.

There is no official roster. Leaders of the hard-line conservative group won’t say exactly how many members are in the caucus, which has already made its mark. The last count, based on conversations with members who are trying to keep track, was 42, but members are being added almost every week; CQ Roll Call has observed 38 attend at least one caucus meeting.

“It’s like ‘Fight Club,’” says Rep. Jim Bridenstine, an Oklahoma Republican and caucus member, referring to a film dialogue in which the first rule is that you don’t talk about it, and the second rule is that you don’t talk about it. . . .

The caucus has taken three official positions to date — and has notched a solid record.

The group opposed reauthorizing the Export-Import Bank, and watched its charter expire last month. It called for a disapproval resolution of a Washington, D.C., abortion law, and the House adopted one (HJ Res 43). And it endorsed a bill (HR 2802) to protect the tax-exempt status of churches that refuse to perform same-sex weddings. Idaho Republican Raúl R. Labrador, the sponsor of the bill and a caucus co-founder, is optimistic it will get a vote.

They haven’t been without losses. The caucus was at the forefront of the failed effort to block President Barack Obama’s executive action on immigration earlier this year.

It’s nice when people fight.