It’s a testament to how arcane a procedure reconciliation is that we haven’t heard this before. Remember, if Obama and Reid go nuclear in the Senate, that’s not the end of the story: The GOP can still try to block the progress of the bill, either by challenging the individual provisions on parliamentary grounds — in theory, only parts that are related to the budget can be passed via reconciliation — or by proposing an endless numbers of amendments to stop the process in its tracks. Keith Hennessey wrote about the latter strategy this morning: