MSNBC: Black Cube investigation of former Obama officials 'for Trump'
Top Democrats called for the Israeli firm to release documents related to the alleged operation.
Follow us on GoogleColin Kahl participates in a panel discussion about Iran's nuclear program on Capitol Hill, February 21, 2012 in Washington, DC.(photo credit: CHIP SOMODEVILLA / GETTY IMAGES NORTH AMERICA / AFP)BySAMUEL THROPE, JTAUpdated: