President Barack Obama turns 54 today. In true birthday spirit, we're taking a look at the biggest "gift-givers" to his 2008 and 2012 campaigns. Drawing from our data, this list includes the largest individual donations to Obama's campaigns--including those to his affiliated committees and super PACs.

Leading the list is James Simons, the billionaire founder of Renaissance Technologies. Hollywood also has a strong presence on the list which includes Dreamworks CEO Jeffrey Katzenberg and prolific filmmaker Steven Spielberg. Fred Eychaner, the Chicago-based Newsweb Chairman, is Obama's biggest hometown supporter. Interestingly, nearly all of Obama's big supporters have Crowdpac scores that are more liberal than his own of 6.8L.

Happy Birthday, President Obama. The 2016 candidates can only hope to have comparable campaign support.

Speaking of campaign donations, check out Crowdpac's exclusive take on the presidential Money Race!

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