After his uncommon, buzzy and ill-fated presidential debut on Twitter final week, Gov. Ron DeSantis of Florida carried out a much more conventional marketing campaign tour this week, barnstorming Iowa, New Hampshire and South Carolina to promote himself because the strongest Republican various to former President Donald J. Trump.
Alongside the best way, he drew sizable, enthusiastic crowds of DeSantis-curious voters. He held babies. He obtained testy with a reporter. He threw some punches at Mr. Trump. He warned of a…