Billionaire investment guru Warren Buffett will help fundraise for President Obama's reelection campaign at two fundraising events in Chicago and New York respectively.

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According to Crain's Chicago Business, Buffett will attend the Oct. 27 Chicago fundraising event alongside a number of major Chicago donors, including former Obama campaign national finance chairwoman Penny PritzkerPenny Sue PritzkerThe Hill's Morning Report - Sanders steamrolls to South Carolina primary, Super Tuesday Biden's new campaign ad features Obama speech praising him Obama Commerce secretary backs Biden's 2020 bid MORE, a longtime Obama supporter and fundraiser; and John Rogers Jr., another early Obama campaign backer.

Buffett will also be featured at a Democratic National Committee fundraiser in New York in late September.

Lately, Buffett's name has increasingly come up in relation to the Obama administration. He wrote a New York Times op-ed in which he argued that the effective tax rate for his income bracket should be higher.

Obama also dubbed a proposal to raise taxes on the wealthy as part of his $447 billion jobs creation legislation the "Buffett Rule." Buffett said he was asked by the administration and approved including his name in the provision's title.