U.S. Democratic Senator Dianne Feinstein on Tuesday released testimony from the founder of the Fusion GPS firm that researched President Donald Trump's ties to Russia and produced a dossier denounced by the White House.

The same political research firm that prepared a dossier on Trump campaign ties to Russia had unrelated information on Clinton Foundation donors that was offered to Donald Trump, Jr.

The Washington Free Beacon confirmed it originally retained the political research firm Fusion GPS to scour then-candidate Trump's background for negative information