By Edward-Isaac Dovere, CNN (CNN) — Josh Shapiro wasn’t the only finalist to be Kamala Harris’ running mate who was asked if he had ever been an agent of a foreign government, four sources familiar with the matter told CNN on Monday. Tim Walz was, too. The Minnesota governor — whom Harris ultimately picked — was asked by her vetting team if he had ever been an agent of China, prompted by aides’ review of the multiple trips Walz took to China before running for office. That was the same line of questioning, four people involved with that process say,...