Ron Paul and Donald Trump are oil and water, fire and ice, Schwartz and Harbaugh. They’re two people whose personal styles just don’t seem to mesh.

Unlike most other GOP contenders, Congressman Paul hasn’t flown to New York for a sit-down with the Donald and some sort of public meal. For his part, Mr. Trump for months has dismissed Paul as a candidate who has no chance to win the Republican nomination.

Now they’re feuding over the fact that Trump is scheduled to moderate a GOP debate on Dec. 27. Will Paul attend? No. He’s planning to be busy.