When it comes to sexual assault claims, it's hard to tell who's telling the truth without evidence, so I look at how people respond.
#GrahamPlatner responded by, essentially, suspending his campaign.
This signals to me that he did it. You stick around if you think you can beat the claims, and you'll feel way more confident in fighting claims like these if you know for a fact that they are false, because if they are true, there technically could be evidence of it that you don't know about yet.