Business groups don’t like being targeted under the Levin plan.

“Discriminatory tax increases, that certainly is not way to solve the problem, and we are very opposed to using tax increases to address this,” said Dorothy Coleman, vice president of tax policy for the influential National Association of Manufacturers.

She said that raising taxes on business was “absolutely the wrong direction.”

Senate Republicans will meet Tuesday at the Library of Congress. House Republicans met last month in Williamsburg, Va.

Republicans have been adamant that revenue should not be part of the mix. They support spending cuts and want to look beyond the immediate problem to find a long-range solution.

In the House of Representatives, Speaker John Boehner, R-Ohio, reiterated his view that the lack of spending cuts would hurt the economy.

“The sooner we solve our spending problem, the sooner we solve our jobs problem,” he said.

The House has passed legislation to delay the sequester with offsetting spending cuts instead of indiscriminate cuts, but the Senate has balked.

The biggest question to be resolved at the retreats involves the politics of dealing with sequestration. Washington endured an ugly fight to avoid the fiscal cliff in January, and then smoothly worked a deal to increase the nation’s debt limit.

“The biggest concern I have, frankly, right now, is the uncertainty, the budget uncertainty on Capitol Hill,” Defense Secretary Leon Panetta told CNN on Sunday, “because if the sequester is allowed to go into effect, I think it could seriously impact on the readiness in the United States, and that’s a serious issue.”