These centrists have declined to endorse Obama’s opening offer to raise taxes by $1.6 trillion, twice the size of the tax increase most of them voted for in July. …

“What I’m doing on all of those fiscal cliff-type issues is just waiting to see what package we put together,” said Sen. Mark Pryor (D), who faces reelection in Republican-leaning Arkansas in 2014. …

Sen. Mark Warner (D-Va.), who faces voters in 2014, declined to endorse the substance of the plan Secretary Timothy Geithner circulated on Capitol Hill last week. …

Sen. Mary Landrieu, another Democrat up for reelection in a red state, Louisiana, said Boehner’s offer “is better than no proposal.”