Lawmakers are also pressuring Huawei. A new bill introduced on Wednesday would ban the export of American technology to Chinese telecommunications companies that have broken U.S. sanctions, including Huawei and its smaller Chinese rival ZTE.

Because the companies make wide use of an array of American parts, like microchips, the bill could have a major impact on their business. A similar ban last year, following a finding that ZTE had violated American sanctions, effectively shut the Chinese company down before the Trump administration lifted it.

“Both companies have repeatedly violated U.S. laws, represent a significant risk to American national security interests and need to be held accountable,” said Chris Van Hollen, a Democratic senator from Maryland and one of the sponsors of the bill, in a statement.

The bill, called the Telecommunications Denial Order Enforcement Act, was also sponsored in the Senate by Senator Tom Cotton, a Republican from Arkansas. In the House of Representatives, it was sponsored by Mike Gallagher, a Wisconsin Republican, and Ruben Gallego, an Arizona Democrat.

The charges in Seattle had hung over Huawei for much of last year, as various other crises were unfolding for the company. The charges were due to pass the statute of limitations last year, but the case was extended.

In plea negotiations last year, Huawei faced the prospect of pleading guilty to a criminal charge of theft of a trade secret and agreeing to some sort of compliance plan, according to one of the people who spoke on the condition of anonymity.

If the case is resolved with a plea agreement, Huawei will most likely plead guilty to a criminal charge of theft of a trade secret and have to agree to some sort of compliance plan, the person said.