President Donald Trump suggested he could impose new “obnoxious” tariffs after the U.S. Supreme Court ruled that his sweeping emergency tariffs are illegal.

The ruling issued Friday overturned the president’s controversial economic agenda, prompting Trump to retaliate by signing an executive order Friday night stating he could bypass Congress and impose a 10% tax on global imports. Just a day later, Trump posted on Truth Social that he was raising the global tariff to 15% “effective immediately.”

Trump invoked Section 122 of the Trade Act of 1974 to allow him to impose a maximum tariff of 15%, but it can only last for 150 days. After that time period, it would need authorization from Congress.

In another Truth Social post Monday, Trump suggested he can use different measures and tools to keep the tariffs in place despite the Supreme Court’s ruling.

“The court has also approved all other Tariffs, of which there are many, and they can all be used in a much more powerful and obnoxious way, with legal certainty, than the Tariffs as initially used,” he wrote.

Trump claims he is in control over trade and does not have to “go back to Congress to get approval of Tariffs.”

“It has already been gotten, in many forms, a long time ago! They were also just reaffirmed by the ridiculous and poorly crafted supreme court decision!” he wrote on his platform.

Trump’s string of posts came after the Trump administration’s trade negotiator Jamieson Greer said Sunday on ABC’s “This Week” that the U.S. tariff policy “hasn’t changed” despite the court ruling.