No need to send me your file. The election ends if Lauren has 20 or more election points on Friday. IIRC, because I haven't played any updates since Oct., the election starts on a Friday. Obviously, if you're trying to end it, you've bribed Diaz for dirt on Matt, given Lauren campaign money, made and distributed Lauren' posters and shown Megan the video of Matt. The only thing left is to make sure that she has 20+ election points Before you go to the choice for election results.
The scene shifts to the gym, where Megan and the cheerleaders either dance for Lauren or Matt. Either way, once the scene switches to the gym where both candidates give a speech, the only thing left is finding out whether Lauren won. If you go to the scene and she's short of the 20 election points, she loses, not only the campaign but, her bet as well. If she has 20+ points, she wins it all. You just have to make sure that you've done everything required for the task. Btw, the MC needs to go to the art teacher at least 3 times for the rest of the campaign mission to be viable.