By Jeff Mason MANASSAS, Virginia (Reuters) -U.S. President Joe Biden took aim at Republicans over their efforts to curb abortion rights in a Virginia speech on Tuesday, but his remarks were interrupted repeatedly by hecklers protesting his policies toward Israel. On the same day that people were voting for a Republican presidential candidate in New Hampshire, Biden and Vice President Kamala Harris – in a bit of counterprogramming – held a rally about abortion, an issue that has proven to drive voters to the polls to oppose conservative measures. “The person most responsible for taking away thi…