In a troubling sign for President Obama, his popularity is dipping — in New York of all places — as he tries to get a handle of the bad economy, the ongoing war in Afghanistan , while trying to push through a controversial health care bill.

Although 57 percent of registered voters across the state believe Obama is doing either an excellent or good job in office, the president’s support has slipped over the summer, according to a Marist Poll released today.

Forty-three percent of state voters currently say Obama is falling short of expectations since taking office in January.

By comparison, Obama got high marks from 63 percent of voters polled by Marist in July.

Of course, Obama’s current approval rating divides along party lines — with 79 percent of Democrats backing the commander-in-chief — down four percentage points compared to July’s poll.

Only 29 percent of Republicans think Obama is doing an excellent or good job — down eight points compared to the July poll.

Registered Democrats outnumber Republicans five-to-one in New York State, which Obama carried in last year’s presidential election.

Fifty-three percent of independent voters — those not affiliated with any party — gave Obama a favorable view — down seven points from July’s poll.