China is pushing the Trump administration to roll back national-security restrictions on Chinese deals in the US, dangling the prospect of a massive investment package as part of a proposal that would upend a decade of policy. The demands from President Xi Jinping’s negotiators also include lowering tariffs on imported inputs from the world’s No. 2 economy used by any Chinese factories built in the US as a result, according to people familiar with the matter, who asked not to be identified discussing priv ...