BLED, Slovenia (AP) — U.S. Secretary of State Mike Pompeo has visited Slovenia to make the case for high-speed wireless networks that bar Chinese companies like Huawei. Pompeo met Slovenian officials in the mountain lake town of Bled on Thursday and signed a joint declaration on “5G Clean Network Security” that aims to keep untrusted telecommunications vendors out. Pompeo has led a U.S. campaign across Europe and elsewhere against Huawei and other Chinese companies the Trump administration accuses of sharing data with China’s security apparatus. Slovenia is a NATO ally and has been a willing partner in the effort. Last month it rolled out a nationwide 5G network with Swedish telecoms giant Ericsson.