By Sofia Ahmed and Ted Hesson NEW YORK (Reuters) -Texas Governor Greg Abbott, a Republican, said on Friday he has started to send buses carrying migrants to New York City in an effort to push responsibility for border crossers to Democratic mayors and U.S. President Joe Biden, a Democrat. The first bus arrived early on Friday at the city’s Port Authority Bus Terminal in midtown Manhattan carrying around 50 migrants from Bolivia, Colombia, Ecuador, Honduras and Venezuela. Volunteers were helping to steer people who had no relatives in town to city resources. “Most of them don’t have anybody to …