奥巴马演讲视频：Obama launches reelection campaign with e-mail, web video（在线收听）

Here's the text of the e-mail the Obama team sent out to backers:

Today, we are filing papers to launch our 2012 campaign.

We're doing this now because the politics we believe in does not start with expensive TV ads or extravaganzas, but with you -- with people organizing block-by-block, talking to neighbors, co-workers, and friends. And that kind of campaign takes time to build.

So even though I'm focused on the job you elected me to do, and the race may not reach full speed for a year or more, the work of laying the foundation for our campaign must start today.

We've always known that lasting change wouldn't come quickly or easily. It never does. But as my administration and folks across the country fight to protect the progress we've made -- and make more -- we also need to begin mobilizing for 2012, long before the time comes for me to begin campaigning in earnest.

As we take this step, I'd like to share a video that features some folks like you who are helping to lead the way on this journey. Please take a moment to watch.

WASHINGTON - President Obama on Monday kicked off his reelection campaign with a quiet video posting rather than the usual hoopla.

In addition to the video, titled "It Begins With Us," the Obama campaign sent an e-mail to supporters announcing the drive for 2012. The announcement had been expected and was signaled in reports throughout the weekend.

Obama pledged to focus on his job, but will pick up the tempo of campaigning this month with several fundraisers. The campaign is hoping to raise a record $1 billion.

Obama is scheduled to be in Washington on Monday, emphasizing his on-the job strategy. Recent polls show Obama's job approval ahead of those of Presidents Clinton and George W. Bush when they decided to run again.

At least 15 Republicans have indicated some degree of interest in opposing Obama.

In his campaign, Obama will stress the economy, healthcare reform and efforts to wind down wars in Iraq and Afghanistan.

Though unemployment has been dropping, it remains high, giving the GOP an opening to attack job creation efforts.

Healthcare still remains controversial, with polls showing a sizable portion of the electorate opposing the law. Conservative Republicans are trying to block funding for the law.

On the foreign fronts, Obama has decreased the number of troops in Iraq, but there are still tens of thousands of Americans there. Obama has pledged to end the combat mission in Afghanistan, but withdrawal of some troops is still months away.