LONDON, Feb 13 (Reuters) - Sibanye-Stillwater's call for U.S. tariff on Russian palladium imports has received preliminary support from the U.S. Commerce Department, ‌although a final decision is not expected until mid-2026, the miner ‌said on Friday. Sibanye-Stillwater, which has production assets in South Africa and the U.S., asked Washington ​in July to impose a tariff on Russian palladium imports to support the long-term viability of U.S. supplies. Trade data indicates that global flows have alread ...