Strains in German coalition as SPD eyes 5G rules that could exclude Huawei

BERLIN (Reuters) - Germany's Social Democrats (SPD) will decide on Tuesday whether to adopt a proposal that could bar China's Huawei from taking part in the rollout of 5G services, which could further strain its alliance with conservative Chancellor Angela Merkel.Merkel's right-left government wants to toughen up technical certification and scrutiny of telecoms equipment suppliers, but insists that no country or vendor should be excluded.Merkel's careful approach, which her critics say stems..