U.S. Republican Presidential candidate Mitt Romney hit the campaign trail with his new running mate this week. Paul Ryan is no stranger to Canadian issues. The Wisconsin Congressman has taken a firm stance on the Keystone XL pipeline, and has spoken out on Canada's corporate taxes and national health-care system. We ask two former ambassadors what the Romney-Ryan ticket means for Canada. Michael Kergin is a former Canadian Ambassador to the U.S., who now works as a senior advisor on cross-border issues at the law firm Bennett Jones. David Wilkins is a former U.S. Ambassador to Canada, and a Partner at the law firm Nelson Mullins Riley & Scarborough, which advocates on behalf of the Canadian Association of Petroleum Producers.