* A fascinating point from Bloomberg News:

Nine of the 10 districts throughout the U.S. with the most people age 45-54 are represented by Republicans...a Bloomberg analysis of census data shows. Those would be among the first Americans to no longer have Medicare as an open-ended entitlement, and instead would be given money to buy private insurance when they’re eligible, under the plan.

That could mean these Republican districts would ultimately feel the impact of Ryancare hardest.

* So there you have it: Senate Dems have gone and drawn a hard line against Medicare benefits cuts in the debt reduction talks.

* Scott Walker wins a big one as the Wisconsin Supreme Court reinstates his rollback of collective bargaining rights. Republicans would have passed it again in any case, but now they don’t have to vote on it again in advance of the recalls.

* Bipartisan agreement! John Boehner, sounding a sentiment shared by liberal Dems, puts Obama on notice: If Sunday comes without Congressional authorization of the Libya operation, you’ll be in violation of the War Powers Resolution.

* Don’t miss Ed Kilgore’s deft debunking of the bizarre claim by some observers that last night’s GOP debate was a heartening display of moderation and maturity.

* Ben Smith gets the nuance right on whether the attacks on Obama over Israel are a problem: For a few, highly interested people, it is; for the broader public, it decidedly isn’t.

* Down the memory hole: Jared Bernstein reminds us that the economic agenda wholeheartedly embraced by the 2012 GOP candidates last night is precisely the same one that got us into our current mess.

* Jonathan Cohn cuts through all of Mitt Romney’s B.S. in taking credit for the auto bailout:

The political difficulty of the auto bailout wasn’t getting tough with Detroit. It was putting up taxpayer dollars, without which a normal bankruptcy restructuring would likely have been impossible. If Romney wants to disown that part of the package, then he has to disown the whole thing.

* Thirty-four Senate Republicans defy the anti-tax brigade and vote for an end to ethanol subsidies, which is laughably being labeled a tax hike.

Though the measure failed, this could signal bipartisan support for ending tax breaks in the debt reduction talks.

* Who woulda thunk it? Robert Gates is pleasantly surprised by the lack of issues coming up as troops prepare for a post-DADT world.

* The slimy and desperate tactics of Prop 8 supporters fail as a federal judge upholds Vaugh Walker’s striking down of Prop 8 despite the suggestion he was too gay to rule fairly.

* Weinergate to be put out of its misery? Dems are hearing from Anthony Weiner’s friends that he may well resign once his wife returns home and helps him take the final step.

* And a quick note to readers: My apologies for the awful tech problems you had to endure today. The Post’s team is working hard to get things back to normal. We really appreciate your patience.

What else is happening?