Diageo, whose own brands include Smirnoff vodka and Captain Morgan rum, is already the largest spirits player in the United States. Any big increase in market share could set alarm bells ringing in the White House. Among Diageo's rivals, privately-owned Bacardi and Beam have around a 10 percent share each of the U.S. spirits market, while Pernod Ricard and Jack Daniel's maker Brown-Forman hold just under 10 percent. We have seen big drink deals done under a Republican administration in the last ten years such as the breakup of Seagram and Allied Domecq and the bringing together of MillerCoors, but deals could be a little more difficult under the Democrats, said another banker.