WASHINGTON (Reuters) – U.S. President Joe Biden took an unusually harsh swipe at his Republican opponents during Earth Day remarks on Friday, calling their party the “MAGA party,” a reference to former President Donald Trump’s “Make America Great Again” slogan. “This ain’t your father’s Republican Party,” Biden said during remarks in Seattle, as he described the difficulty in getting Republican support for his climate change and other goals in Congress. “All you got to do is look at what’s being played this morning, about the tape that was released,” Biden said, without going into specifics. T…