Trump has made a number of decisions that will harm Russia in a major way. Russia's, with a GDP of $1.33 trillion (similar to Italy), major industries are mineral extraction and arms exports. Mineral extractions include natural gas, oil, chromium, uranium, and such. Her military arms are second rate, but sufficient for most second world nations.
With approval of the Keystone XL and Dakota access pipelines, he's caused major problems for the Russians. With the expanded production for the Texas Permian formation and the new Exxon refineries on the coast, the US will be the major exporter for the western hemisphere.
All of the above are major problems for the Russians. Their latest wells in Siberia can't be capped for a time as they will freeze, requiring new drilling and insertion of pipes to the source.