During the Cold War, definitely. Not as much recently, only a bit. They searched long and hard with regard to Trump, but the only thing they found was a $100k Facebook ad purchase, and that wasn’t even pro-Trump, it was mixed - to stir things up. As to the ‘environmental movement’, they may have seeded it, but the vast majority of it is home-grown. For example the 20th Anniversary of Earth Day was April 20, 1990 - just after the Berlin Wall, and the country was SWAMPED with how the planet was about to end. It wasn’t the Soviets, they were broke and about to collapse...it was AMERICANS who pivoted that way and have never stopped.
China, on the other hand, has their fingers in literally EVERYTHING in this country. I’d be shocked if they don’t already have FBI-level files on every American at this point, for example.
Russia doesn’t have to seed the Democrat party like it had to do in the past, because those seedlings have sprouted and germinated and multiplied, so that it is now mostly a homegrown cancer. Russia’s investment paid off exponentially.