Why 5G Leader Huawei Could Get Shut Out of a Major Rollout

American officials raised concerns about the company with Australian Prime Minister Malcolm Turnbull in February

A secretive panel called CFIUS is paving the way for President Trump to block more foreign business deals due to national security concerns. WSJ’s Shelby Holliday explains why you’ll hear more about CFIUS during the Trump era. Illustration: Laura Kammerman

Rob Taylor in Canberra, Australia and

Dan Strumpf in Hong Kong

June 15, 2018 6:47 a.m. ET

Australia is looking at barring Huawei Technologies Co. from taking part in the rollout of next-generation 5G telecommunications infrastructure, which would deal a blow to the Chinese company’s global ambitions to be a leader in the technology.

Australia’s security agencies are pushing for Huawei to be locked out of supplying equipment to the latest mobile communications networks because of cyberspying fears. While Australia isn’t a big market, a ban would be significant as the most extensive effort by a U.S. ally to block...