The cited article seems to be long on quick interviews with ardent Trump supporters at the Waco rally, and less long on polling data.

One paragraph from the cited article (with links to polling data)...

...Mr. Trump's political strength has long proved difficult to fully measure. While polls show that he enjoys a commanding advantage in a Republican primary field, most surveys also show that about half of the party's voters would prefer another nominee at this early phase in the 2024 contest....