President Barack Obama held his ground on the "fiscal cliff” on Tuesday, insisting on higher tax rates for the wealthiest Americans, while Republicans showed increasing disarray over how far they should go to compromise with Obama’s demands.With less than a month left to confront the budget cuts and tax increases that will begin taking effect in January unless Congress acts, Obama dangled the possibility of lowering tax rates as part of a broad U.S. tax code revamp in 2013.But he again insisted, in an interview with Bloomberg Television, that tax rates for the wealthiest 2 percent of taxpayers must rise in any deal by the end of the year to avert the assorted measures known as the fiscal cliff.Obama, a Democrat, may face resistance from his own party if and when he’s forced to be specific about how he would cut the cost of entitlements, such as the Medicare health insurance program for seniors.For the moment, however, the overall political picture Tuesday reflected a relatively solid front of Democrats versus an increasingly shaky group of Republicans.Mitch McConnell, the Republican minority leader in the Senate, even avoided endorsing the negotiating position of his House of Representatives ally, Speaker John Boehner."I think it is important that the House Republican leadership has tried to move the process forward,” McConnell told reporters trying to get his views on a proposal Boehner and the House Republican leadership sent to Obama on Monday.Outside the capital, concern mounted about how and when - not to mention if - the politicians might put their disagreements behind them and deal conclusively with an issue that economists say could trigger another recession.Corporate chief executives were scheduled to meet with Obama later on Wednesday. The Business Roundtable, a lobbying group for corporations, has arranged the meetings. In addition to prompt action on the fiscal cliff, the group is seeking tax cuts for their companies.