(MCT) — WASHINGTON — The effort to resolve the standoff over federal spending and taxes snagged once again Tuesday — just a day after House Speaker John A. Boehner and President Barack Obama appeared to make substantial progress — as Boehner abruptly shifted to what he termed “Plan B.”

The speaker’s new proposal calls on the House to vote on a measure that would prevent taxes from going up except for those earning more than $1 million. The proposal drew opposition from the White House and Senate Democrats as well as from some House conservatives.