WaPo: “A brewing and potentially bitter fight over Democratic efforts to curb filibusters is threatening to inflame partisan tensions in the Senate, even as President Barack Obama and Republicans explore whether they can compromise on top tier issues such as debt reduction and taxes. A potential showdown vote to limit Senate filibusters would not come until January. Democrats are threatening to resort to a seldom-used procedure that could let them change the rules without GOP support, all but inviting Republican retaliation.”