Actually using import taxes – tariffs – to finance a big chunk of the federal government would be a painful and perilous undertaking, budget wonks say.

The United States doubled tariffs on steel and aluminium imports on Wednesday, activating a hike in the duties on the imported metals to 50% from the 25% rate introduced in March. The day also marks the Trump administration’s deadline for trading partners to submit their “best offers” to avoid further steep import duties set to take effect in early July.

China has accused President Donald Trump of causing severe disruption to global supply chains after he doubled the United States' steel and aluminum tariffs to 50 percent. Trump hiked the Section 232 tariffs in a proclamation that took effect on June 4,