President Obama plans to nominate Solicitor General Elena Kagan to be the 112th justice of the Supreme Court, sources said late Sunday night.

Obama is expected to make the announcement mid-morning Monday in the East Room, accompanied by Kagan. He informed his advisers about the choice on Sunday, after spending nearly a month looking at candidates. But he settled relatively early on Kagan, whom he had considered during the last Supreme Court vacancy, said sources familiar with the process, who spoke on the condition of anonymity because the decision has not been announced.

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