BEIJING (AFP) - The decision as to which city wins the right to host the 2016 Summer Games may in the end come down to which head of state or government proves more of a headturner for the IOC members when they come to vote on it in Copenhagen in October next year. Indeed any of the four bidding cities who fail to lure their top representatives to the denouement would risk, based on the two previous decisions, losing precious votes such is the intoxicating lure of power IOC members believe they hold over some of the most powerful leaders in the world. "Imagine what it feels like to an IOC member that these heads of state are coming to them if not on their knees certainly in supplication looking for their votes. It is a powerful position to be in and for some members makes up for the fact that they cannot visit the cities," an IOC insider told AFP. The precedent was set by then British Prime Minister Tony Blair, whose lobbying, for London's bid for 2012, in Singapore where the vote was held was deemed to be crucial. The IOC members were not so flattered that the then French President Jacques Chirac turned up only on the eve of the vote. Even more crucial was the appearance of then Russian President and now Prime Minister Vladimir Putin in Guatemala City last year where he capped a final few days of frenetic lobbying by speaking in English and French - a first for him in public - at the final presentation. In the event the Russian candidate Sochi prevailed by a slim margin over Korean rival Pyeongchang - whose president also came to woo the members - whilst third placed Salzburg also had their Chancellor on hand. There are some IOC members, however, who believe they should not be allowed to come as to their minds the more powerful the country the more influence they could have and thereby overshadow the quality of the bids. "If you were presented with the President of the United States and the Prime Minister of Japan or the President of Brazil, it is pretty clear a lot of members would be swept of their feet that they had the most powerful man in the world begging them for votes," an IOC source told AFP. "I do not think that is a very balanced or healthy way to come to a decision on the merits of a bid," the source added. IOC president Jacques Rogge intimated after the vote in Guatemala the situation regarding the presence of heads of state would be looked at, but as yet there has been no decision taken. Certainly all four chiefs of the 2016 bid cities intimated on Saturday that they were expecting their heads of state or government to be present in support of their candidacies next year. "I can't of course speak for the head of state," said Chicago bid chief Patrick Ryan. "However, in my opinion whichever one of them is elected to be president in November (Chicago-resident and Illinois senator Barack Obama for the Democrats or Republican candidate John McCain) will want to be there. "GW Bush came to the opening ceremony which is the first time that a sitting president has attended an opening ceremony outside of the United States. He was saying to the IOC and the world 'we want you to come to the USA'. It was an important personal statement," added Ryan. Tokyo are linked strongly to the government so they would expect their prime minister to appear while Brazil's charismatic and personable president Lula has been in Beijing and is fully supportive of their bid. However, it may be Madrid which holds the aces as bid leader Mercedes Coghen revealed. "The King and Queen have been involved. They should definitely be in Copenhagen for the decision," said the 46-year-old, who won field hockey Olympic gold in Barcelona in 1992.