First Steps Toward Penalties
That action, a 25% tariff on Indian goods for buying Russian oil, also marked the first financial measure of Trump's second term to help hobble Russia's global energy revenue. China, the number one purchaser of Russian oil, has not faced secondary penalties — but that could change.

Trump tactics have been deployed in other non-trade battles, too, such as cajoling Denmark over Greenland to arm-twisting Mexico and Canada to curtail fentanyl shipments or slapping Brazil with penalties for political investigations. Broader application of secondary tariffs could help slice off a main revenue stream for Russian President Vladimir Putin but also drive up oil prices — a trouble for Trump ahead of the next U.S. midterm elections. This move could further entangle the U.S. in ongoing trade negotiations with both China and India, which have large supplies of the minerals as well as other forms of leverage like pharmaceuticals.

Putin had signalled his willingness to absorb more economic punishment, and analysts discounted the possibility that these specific tariff threats would lead to a cease-fire.

Repercussions in Russia and World Markets
The world's No. 2 oil exporter, Russia, has been under a price cap since late 2022, which has prompted Moscow to divert exports from Europe to India and China at cut-rate prices. This has added costs for Moscow, but it has also prevented global oil supplies from being disrupted. The White House has suggested that a summit between Trump and Putin could happen soon, but it is unclear whether Russia would be willing to change course in the war.

Secondary tariffs, said experts, would have a ricochet effect in worldwide markets as well. Cutting off the 1.7 million-barrels-per-day flow of Russian crude into India — which accounts for around 2% of the world's supply — could easily raise prices from $66 a barrel to somewhere in the $80s or beyond. In March 2022, prices advanced toward $130 per barrel in another such surge. The U.S., despite assertions to the contrary by Trump, would not have been able to ramp up production fast enough to make up for any losses.

Risks and Possible Retaliation
The CPC Pipeline from Kazakhstan, which carries up to 1 million barrels daily and is used by western oil majors Exxon, Chevron, Shell, ENI and TotalEnergies — among others may also undergo disruptions as Russia could close the pipeline. The pipeline has a throughput volume of 1.7 million barrels per day, the full shutdown of which could spark an international supply crisis.

Economists warn that energy shocks can be particularly dangerous in an economy with anaemic job growth and a weak housing market on the verge of collapse. Inflation and global instability could still be game changers, though it remains to be seen how well the tariffs would play with voters as tough action against Russia.