WASHINGTON D.C. : The Trump administration is weighing a plan to slash the 145% tariff on Chinese imports by more than half — effective as soon as next week — as top US and China officials head to Switzerland for high-level trade negotiations, The Post has learned.

Specifically, US officials are discussing a proposal to lower President Trump’s punishing levy on China goods to between 50% and 54% as they begin what promise to be lengthy talks to hammer out a trade agreement, sources close to the negotiations said.

Meanwhile, trade taxes on . . .