Trump expected to tap US Senator Marco Rubio for secretary of state, sources say

By Gram Slattery and Steve Holland WEST PALM BEACH, Florida (Reuters) -Donald Trump is expected to tap U.S. Senator Marco Rubio to be his secretary of state, sources said on Monday, putting the Florida-born politician on track to be the first Latino to serve as America's top diplomat once the Republican president-elect takes office in January. Rubio was arguably the most hawkish option on