LAUSANNE, Switzerland (AP) ― With the voting just over two months away, the bidding for the 2020 Olympics and the race for the IOC presidency are reaching a pivotal stage.

Both campaigns come together this week in Lausanne as the three bid cities and six presidential candidates make vital presentations to the voters ― the 100-plus members of the International Olympic Committee.

Istanbul, Madrid and Tokyo make their pitches to the IOC assembly on Wednesday, with the Turkish city having the most at stake following the wave of anti-government protests that swept the country. The presidential contenders present their platforms to the members on Thursday.

Both events could prove decisive going into the final weeks before the IOC session in Buenos Aires, Argentina, where the members will vote by secret ballot for the host city on Sept. 7 and the new president on Sept. 10.

The presentations will be made behind closed doors at the Beaulieu convention center. The bid cities will each have 45 minutes to make their case, with another 45 minutes allotted for questions and answers. The presidential candidates will each have 15 minutes to outline their manifestos.