With polls confirming the race for the White House is a dead heat, President Bush is hammering home his message about security.Two weeks before the November 2 election, the candidates are focusing on the battleground states, with the president in Florida. Bush said: “If America shows uncertainty or weakness in this decade, the world will drift towards tragedy – this will not happen on my watch.” Democrat Senator John Kerry has been in Pennsylvania. Among other issues, he said flu vaccine shortages were proof of Bush’s mismanagement: “I believe that we need a president who defends America, and fights for the middle class at the same time.” Britain is one place where big money is being spent on bets over who is going to win. Bookmakers William Hill put the chance of a Bush victory at 4 to 7, and Kerry at 5 to 4. Spokesman Rupert Adams said: “It’s been surprisingly popular. We feel across the industry there could be a five million pound turnover on the US elections. Because Bush and the British government have been working together as allies in Iraq, we’ve seen the British public backing Bush.” Some people are said to have made four and five figure bets.