Davis and Barack Obama
In his memoir Dreams from My Father, Barack Obama wrote about "Frank", a friend of his grandfather's. "Frank" told Obama that he and Stanley (Obama's maternal grandfather) both had grown up only 50 miles apart, near Wichita, although they did not meet until Hawaii. He described the way race relations were back then, including Jim Crow, and his view that there had been little progress since then. As Obama remembered, "It made me smile, thinking back on Frank and his old Black Power, dashiki self. In some ways he was as incurable as my mother, as certain in his faith, living in the same sixties time warp that Hawaii had created." Obama also remembered Frank later in life when he took a job in South Chicago as a community organizer and took some time one day to visit the areas where Frank had lived and wrote in his book, "I imagined Frank in a baggy suit and wide lapels, standing in front of the old Regal Theatre, waiting to see Duke or Ella emerge from a gig." 
Gerald Horne, a contributing editor to the CPUSA official publication Political Affairs, identified "Frank" as Davis, and "a decisive influence in helping Obama to find his present identity" as an African-American. Claims that Davis was a political influence on Obama were reiterated in the hotly-disputed anti-Obama book The Obama Nation. A rebuttal released by Obama's presidential campaign, titled Unfit for Publication, confirmed that "Frank" was, in fact, Frank Marshall Davis, but disputes certain claims about the nature of their relationship.
Frank Marshall Davis - Wikipedia, the free encyclopedia