People close to former President Trump made preliminary overtures to Robert F. Kennedy about the possibility of serving as his running mate, The Post has learned. “Trump operatives expressed an interest in Kennedy early on, but it was all premature,” said one person familiar with the matter, adding that it was “right out of the box when Bobby announced” in April 2023 he was running for president. “Anything’s possible. I wouldn’t write it off by any means,” the insider continued.