During the political season, I sometimes read it said that Ronald Reagan was the "first divorced president". The purpose of that observation depends on the pundit's agenda. Sometimes it's cited to show the hypocrisy of the religious right. We rail against divorce, but made a convenient exception for Reagan. This is sometimes set in contrast to reputedly faithful husbands like Carter or Obama. (Of course, that backfires if we include FDR, JFK, LBJ, and Bill Clinton.)
More recently, I've seen it used in support of Trump. In fact, there's a Newsmax article that claims Trump and Reagan have 15 things in common, including divorce. Indeed, the Newsmax article says "Reagan divorced Jane Wyman".
A few quick observations:
i) It's true that Trump and Reagan have some things in common. For instance, both men have a full head of hair at an age when many men are bald or balding. If that doesn't make Trump Reagan's true heir, I don't know what would.
ii) I haven't studied Reagan's life in-depth–it doesn't interest me–but from what I've read, he didn't divorce Jane Wyman. The passive voice–"first divorced president" is ambiguous. Who divorced whom? From what I've read, it wasn't Reagan who walked out on the marriage, but Wyman. He didn't want a divorce. She divorced him. One reason, or so I've read, is that at the time she was a bigger star than he was. She may have felt he was a drag factor on her career.
iii) I'd add that the question is a red herring. Reagan isn't the standard of comparison. Conservatism is an ideology, not a person.
And in any event, the comparisons don't work in Trump's favor. From what I can tell, he was devoted to one wife at a time–unlike Trump. Although Reagan wasn't a great thinker, he tried to work out a consistent conservative philosophy. And, within the limitations of the democratic process, he tried to implement his political philosophy.
iv) It's not hypocritical to choose a candidate whose private life is at variance with conservative values. I'm not the candidate. I'm not responsible for how he chooses to live his life. It's his life, not mine. I don't make those decisions for him.
v) I'd add that from a Protestant perspective, divorce isn't inherently wrong. It depends on the circumstances.
vi) There are, of course, Trump apologists who are joined at the hip with Trump. Because they lack the critical detachment to disassociate persons from policies, they become tarnished.