OTTAWA - U.S. Senator Ted Cruz, who says he recently discovered he is likely a Canadian, must win security clearance from Canada's spy agency, fill out a four-page form and then wait up to eight months to sever his ties to America's northern neighbor. Cruz, a Texas Republican who has fueled speculation that he may run for president in 2016, was born in Canada, which automatically makes him a citizen. On Monday he offered to renounce that citizenship. ... People giving up Canadian citizenship must prove they are or will become a citizen of another country, do not live in...