Unger describes how Trump first appeared on the Russians’ radar in 1977 when he married his first wife, Ivana Zelnickova, a Czech model. Trump became the target of a spying operation overseen by Czechoslovakia’s intelligence service in cooperation with the KGB.
https://www.theguardian.com/us-news/2021/jan/29/trump-russia-asset-claims-former-kgb-spy-new-book