I believe one of the woman who showed up to the second debate was paid like $2500 by the Trump campaign or a related entity so that's a good start. A second decent lead would be looking into what Ken Starr said about the women during the 90s, a third one would be how one of the women has recanted I believe twice or so.

In Donald Trump's case, no woman has recanted except his ex-wife who also said she was raped by him in their marriage. But none of the recent women have, none have been proven to have any connections or have been paid to come forward and all the accusers are diverse. Obviously the smoking gun is that Trump admitted and confessed on tape to sexually assaulting women unlike Bill Clinton, who hasn't been loyal in marriage but seemed to have consensual relationships with quite a few women.