WASHINGTON – A Capitol Hill deal to avert the “fiscal cliff” was proving elusive Sunday as a deadline to avert tax hikes on virtually every American worker and block sweeping spending cuts set to strike the Pentagon and other federal agencies grew perilously near.

Senate Majority Leader Harry Reid, D-Nev., and Senate Republican Leader Mitch McConnell remained at odds on such key issues as the income threshold for higher tax rates and how to deal with inheritance taxes, among other issues. McConnell complained that Reid had yet to respond to a GOP offer made Saturday evening and reached out to Vice President Joe Biden, a longtime friend, in hopes of breaking the impasse. Biden assumed the lead role for Democrats, and a McConnell spokesman said the Kentucky Republican and the vice president were expected to negotiate by telephone into the night.

Rank-and-file lawmakers left the Capitol on Sunday night with hopes that their leaders would give them something to vote on when they returned today.