WASHINGTON (AP) — Playing both sides, President Barack Obama is trying to balance his public pressure campaign on Republicans over the looming "fiscal cliff" with his private negotiations with GOP leaders.

The White House is loath to abandon the two-pronged strategy even as the Dec. 31 deadline nears. Obama's advisers see the carrot-and-stick approach as key to winning concessions from Republicans on taxes and reaching a deal to avert the series of year-end tax hikes and spending cuts.

But Obama's campaign to rally public support for his fiscal cliff positions has irked some Republicans. And continuing to publicly lambaste GOP lawmakers as obstructionists for not giving in to White House demands that tax rates rise on the top 2 percent of income earners could undercut trust between Obama and Republicans in their private talks.