“Wasn’t Trump also a democrat till just prior to 2016?”
Trump has changed his party affiliation a number of times.
“Donald Trump registered as a Republican in Manhattan in 1987; since that time, he has changed his party affiliation five times. In 1999, Trump changed his party affiliation to the Independence Party of New York. In August 2001, Trump changed his party affiliation to Democratic. In September 2009, Trump changed his party affiliation back to the Republican Party. In December 2011, Trump changed to “no party affiliation” (independent). In April 2012, Trump again returned to the Republican Party.”