NEW YORK — A U.S. House of Representatives committee is investigating allegations of antisemitism at Columbia University, according to a letter sent to university officials Monday. Its launch is the latest in a series of probes by the Republican-led Committee on Education and the Workforce into elite colleges’ ability to protect its Jewish students. “We have grave concerns regarding the inadequacy of Columbia’s response to antisemitism on its campus,” Committee Chairwoman Rep. Virginia Foxx, R-N.C., wrote in the letter. Foxx pointed to a “pattern of deeply troubling incidents and developments …