(See below for updates for Friday, 6/18/10.)

What a day for the DISCLOSE Act.  We wake up to two major newspapers endorsing a version of the bill with a targeted amendment apparently written to remove the National Rifle Association’s opposition to the legislation.  Next comes word that the bill has been tweaked again, this time to remove opposition from the Sierra Club, apparently.   A scheduled 3 p.m. meeting of the House Rules Committee, to clear the way for a floor vote, was postponed.  Meanwhile, two prominent Democratic Senators announced their likely opposition to the proposal.  All this turmoil comes less than 24 hours after the White House doubled-down by supporting the bill on the White House Blog.

Peter Roff writes about what’s transpired in this column.

With Feinstein in opposition, the GOP may now be able to sustain a filibuster of the Disclose Act on the Senate floor, given that she is one of a small handful of Democrats who would rather fight the NRA–on principle as well as for its political value–more than they would like to muzzle conservative advocacy groups. With the exemption the bill passes the House and may fail in the Senate. Without the exemption, it cannot pass the House, leaving the Democrats in a box no matter what the NRA does.

UPDATE:  6/18/10:  Maybe next week?  Politico reports.

Pelosi summoned the Blue Dogs and CBC to back-to-back meetings this afternoon, but was unable to overcome their opposition to the legislation. The Blue Dogs are concerned that opposition from the Chamber, National Federation of Independent Business, National Association of Realtors and other business groups will damage their reelection prospects in the fall.

The CBC, on the other hand, was unhappy about an exemption to the bill granted to the National Rifle Association agreed to by Van Hollen. While the exemption was later extended to other groups, the CBC remained concerned about the bill’s potential impact on the NAACP and other progressive groups.

Politico also has this massive story on the bill.

The Times says loopholes are growing.