Florida Gov. Ron DeSantis (R) and his allies are trying to change the narrative about a campaign that is widely seen as having underperformed so far. DeSantis is drawing the support of about 1-in-4 Republican voters; he was backed by around 1-in-3 in mid-March. As they seek to shift perceptions onto a more favorable footing, they stress a number of points, including that the campaign is at a very early stage; DeSantis is showing strength in fundraising; he has withstood a barrage of attacks from Team Trump with his favorability intact; and his record in Florida, both electorally and policy-wise,...