This oversight without clarity is nearly pointless. We can't assume refusal to answer is admittance of guilt, however this does not paint those employed by groups related to the Clinton campaign in a positive public light.
The ONLY time I've agreed with Obama was when he said, "the only people who don't want to disclose the truth, are those with something to hide". This substantiates that. Video for reference: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-bhFB7-w2MY8.html