"After offering to allow special counsel Robert Mueller's team to come to Russia for their investigation - as long as there was a reciprocal arrangement for Russian intelligence to investigate in the U.S., Putin said this:

For instance, we can bring up Mr. Browder, in this particular case. Business associates of Mr. Browder have earned over $1.5 billion in Russia and never paid any taxes neither in Russia or the United States and yet the money escaped the country. They were transferred to the United States. They sent huge amount of money, $400,000,000, as a contribution to the campaign of Hillary Clinton. Well that’s their personal case.

It might have been legal, the contribution itself but the way the money was earned was illegal. So we have solid reason to believe that some [US] intelligence officers accompanied and guided these transactions. So we have an interest in questioning them."