Follow the money, as was said in Watergate days. If the appearance of corruption matters, there’s a lot of explaining to be done about the Clinton Foundation’s doings with international donors.
Just now posted on Drudge with link to this story:
Exclusive: Despite Hillary Clinton promise, charity did not disclose donors (Reuters story)
But in a breach of the pledge, the charity's flagship health program, which spends more than all of the other foundation initiatives put together, stopped making the annual disclosure in 2010, Reuters has found.