President Obama leads Mitt Romney by seven points, poll says

President Barack Obama's post-convention bounce just keeps growing.

The president's lead over Republican challenger Mitt Romney grew to seven percentage points, according to a new Reuters/Ipsos poll of likely voters.

"The daily online poll asked 990 voters over the previous four days which candidate they would choose if the election were held today," Reuters explained.

The response: 48 percent choose Obama, while 41 percent picked Romney.

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The gap among the candidates has been growing since last week's Democratic National Convention.

Ipsos pollster Julia Clark told Reuters, "What that really means is that Obama is in good shape."

Voters polled favored Romney's stance on the federal budget but preferred Obama's policies on the war on terror, health care, taxes and social security.

Over the last few days, foreign policy has been a more crucial campaign issue as anti-US violence has swept across Libya, Egypt and Yemen.

A new Marist poll also shows Obama building leads over Romney in Ohio, Virginia and Florida – all key swing states.

The poll shows Obama with a 5 point lead in Virginia and Florida, plus a seven point lead in Ohio.