Except for:
- being the first president to approve arms to Ukraine.
- Pushing for, and getting, a tactical nuke program to counter Russia (which Biden subsequently made part of long term doctrine and expanded to include China).
- Large economic restrictions against Russia via CAATSA.
- Freezing assets of Russian billionaires and political figures, so extremely that even Europe said this was too far.
- As a parting shot on his last day of his term put a sanction on Russian operations that stalled Nord Stream 2
- Withdrawing from INF specifically to escalate against Russia.
In Trump term 2, he is now offering mild targeted, temporary, prerogative-based rollbacks of sanctions as part of diplomacy, but none of these changes would reduce sanctions to pre-Trump levels. Trump has been harder on Russia than Obama, W Bush, and Clinton. The only person who was harder on Russia than Trump was Biden, and Biden did it as a continuation of Trump's first term policies. Trump is now softening those.
This whole story that Trump is a Russian asset is a cover story to avoid telling the truth: the US is being forced to negotiate with Russia because it cannot achieve its goals on the battlefield. This truth is unacceptable to the establishment and it's a problem for the image of total dominance, so the story is instead that Trump is a Russian asset because that's the only other explanation for why the US is negotiating with Russia right now.
The reality is that Trump implemented and maintains some of the strongest sanctions against Russia that have ever existed, and doing so required him to push sanctions norms further than anyone else in the West.
Trump is a threat for completely different reasons. The whole Russian influence narrative is a distraction.