the don jr trump tower meeting was SET UP by HRC to stage a campaign contribution violation = getting anything "of value" from a foreign source is a violation
but as much as they wanted to even mueller's pitbulls could not make it stick
here is the conclusion:
no judicial decision has treated the voluntary provision of uncompensated opposition research or similar information as a thing of value that could amount to a contribution under campaign-finance law.
report page 187
pdf page 195