Could Soviet rail logistics support an Alaska invasion?

Could Soviet transport infrastructure support an invasion of Alaska in 1946?

It was conceivable because the Trans-Siberian Railway had carried major forces east in 1945, but the distance from the rail network to the Bering Strait left a serious logistical gap.

A viewer challenges whether Siberia had the transport network needed for a Soviet move into Alaska in 1946. The Trans-Siberian Railway had shifted forces east for the 1945 attack on Japanese forces in China, showing that a large redeployment was possible. The Bering Strait still lay far beyond the nearest major railway, and the recollection of a mining branch extending farther north remains tentative. The counterfactual depends on a difficult final approach, severe terrain, and Soviet willingness to accept losses rather than an effortless invasion route.