*Once again it’s on.

With a 5 a.m. video sent Monday via email and text message to supporters, President Barack Obama announced his intention to seek reelection in 2012.

By filing papers with the Federal Election Commission, the president can begin fundraising for his 2012 operation, which will be headquartered at One Prudential Plaza in Chicago — just a short hop away from the site of his victory speech in 2008 at Grant Park.

Jim Messina, who worked as deputy chief of staff to the president for two years until last January, will serve as campaign manager for Obama’s effort to stay in the White House.  The Washington Post notes that many of the names who helped Obama win in 2008 will be on board to advance his second presidential campaign.

This morning, the Obama For America premiered the 2 min 10 sec video – titled “It Begins With Us.” The footage contained no images of Obama, and featured voice over from American citizens discussing their reasons for supporting the president’s 2012 campaign. [Scroll down to watch.]

“This campaign is just kicking off,” the site states. “We’re opening up offices, unpacking boxes, and starting a conversation with supporters like you to help shape our path to victory.”

Below: Obama for America’s full email and video.

Friend —

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: