Has he violated the constitution in any way? Saying mean things aren't grounds for impeachment
At the same time, I felt the Lord reminding me to respect Ms. Clinton's career, and not refer to her as just "Hillary," or her husband as "Bill," but, as "Former Secretary of State, and Senator, Mrs. Hillary Clinton, " or something similar, and her husband, former President Bill Clinton. Together as, "Former President, and Former Secretary of State, Mr. and Mrs., Bill and Senator Hillary Clinton." or similar formal title-- maybe someone knows protocols.