A rising tide of Chinese deal-making in the U.S. is spurring Congress to propose tighter measures to restrict investments that are increasingly viewed as a threat to America's national security.

Lawmakers in Washington are moving to broaden the government's authority to scrutinize overseas investment in the U.S. with bipartisan legislation set to be proposed in the coming days, according to people familiar with the matter.

The proposal follows a drumbeat of concerns from lawmakers about recent Chinese deals in U.S. technology, agriculture and financial services. Chinese acquisitions and minority investments in the U.S. peaked in 2016 at $45.9 billion, up from $17.7 billion in 2015, according to Bloomberg data. Chinese deals in 2017 so far are behind 2016's pace at $23.6 billion.