BARACK OBAMA (D-IL) Top Contributors (for 2006) 1 University of Chicago $156,054 2 Kirkland & Ellis $143,138 3 Henry Crown & Co $79,500 4 Sonnenschein, Nath & Rosenthal $74,950 5 Northwestern University $72,930 6 Exelon Corp $71,850 7 Sidley, Austin et al $71,432 8 Mayer Brown $69,960 9 Jenner & Block $62,710 10 Soros Fund Management $61,605 11 Goldman Sachs $61,500 12 Clifford Law Offices $59,550 13 Simmons Cooper LLC $58,500 14 Tejas Securities $57,250 15 JP Morgan Chase & Co $56,600 16 Ariel Capital Management $55,650 17 Skadden, Arps et al $54,071 18 Winston & Strawn $52,450 19 Piper...