Barack Obama will look to rebound from one of the most difficult weeks of his six-month presidency, one in which his legislative priority, healthcare, stumbled and he got caught up in a racial controversy.

Obama has the task of keeping up the momentum on his proposed US$1 trillion overhaul of the US healthcare system, after internal divisions broke out among Obama's Democrats who control the US Congress.

The Senate delayed action until the fall and the House of Representatives is lurching toward a possible vote before the August recess but may be forced to wait as well.

Obama's soaring rhetoric helped him win the presidency and propelled his first months in Washington. But despite his frequent speeches declaring a healthcare revamp is urgently needed to help rebuild the US economy, US citizens are still expressing some uncertainty.

A Gallup poll released said only 41 percent of those surveyed wanted legislation approved this year, and the poll was done, one day after Obama's healthcare-dominated news conference.

Other poll results paint a picture of an apparent rough patch for the president, as he tries to steer the country out of a lingering recession while pushing an ambitious agenda of making healthcare more affordable and accessible and addressing global warming.

He still has a job approval rating well over 50 percent in most polls, clear evidence the president remains personally well-liked, although his numbers are lower than they were in the national euphoria immediately after he took power.

But US citizens are beginning to sour on his economic policies. A USA Today/Gallup poll last week said that by 49 percent to 47 percent, those surveyed disapprove of how he is handling the economy, a turnaround from his 55 percent to 42 percent approval in May.

The poll said the biggest drop came from conservative and moderate Democrats.

Fifty-nine percent said his proposals called for too much government spending, the poll found.

GATES FLAP

At a news conference, Obama diverted from healthcare briefly and it got him into trouble.

It was in answer to a question about the arrest of a prominent black scholar at Harvard University, Henry Louis Gates.

Gates, a friend of Obama's, accused Cambridge, Massachusetts, police Sergeant James Crowley of racist behavior when Crowley arrested him after Gates forced open the door of his own home and was mistakenly suspected of a break-in.

Obama, the first black US president and one who projects an image of calmness and rectitude, said police had "acted stupidly."

•Obama touts healthcare plan for small businesses