Caroline Kennedy rallied supporters to President Obama’s reelection campaign in an email Saturday.

Kennedy commemorated the four-year anniversary of her uncle, the late Sen. Edward Kennedy (D-Mass.), endorsing Obama's campaign for the White House. She reflects on that day in January 2008 when she joined the elder Kennedy and Obama on stage in front of thousands of students at American University.

Barack ObamaBarack Hussein ObamaPatagonia files suit against Trump cuts to Utah monuments Former Dem Tenn. gov to launch Senate bid: report Eighth Franken accuser comes forward as Dems call for resignation MORE had stirred something in young people and the young at heart. I saw the passion in my own teenage children, and I heard it from a different generation of people who said they felt like they did when my father ran for president,” Kennedy writes. “We felt strongly that we needed to elect a president who urged us to believe in ourselves, who could tie that belief to our highest ideals, and who understood that together we can do great things.”

She directs supporters to the Obama campaign’s website where they can say “what first inspired” them to support the president. Kennedy's email also names some of the president’s achievements during the first term, such as passing the healthcare reform law and repealing “Don’t Ask, don’t Tell."

Kennedy says this year’s election will be more difficult than the last one.

“The 2012 election will be harder than the last. As you think about what role you can play this time, I want you to remember that when Teddy joined this campaign, it wasn't just Barack Obama who drew him in. It was you,” Kennedy writes. “The possibility of a campaign run by ordinary people determined to change our country for the better and willing to work as hard as necessary inspired him then, and it's what inspires me today. Thanks for all you do.”

She also links to a video of Sen. Kennedy’s endorsement speech of Obama in 2008.