In 2016 my wife was a huge supporter and he wasnt my first choice to say the least!
Fast forward almost 4 years.
I donate to his campaign
Have Trump signs in my yard
Will set the alarm for when early voting begins in Florida
This author definitely captured me as a walk on glass voter for him, for what it is worth
Like you, I was a lukewarm Trump supporter in 2016.
An I suspect a large majority of conservatives like myself voted for Trump in 2016 because he was not Hillary, but did not expect much from a New Yorker who, like so many other Republicans before him, promised to tackle the border, undo the previous job killing trade agreements, and put originalists back on the Federal courts.
But to my genuine surprise, the President has followed through on his promises, an won me over as a supporter by his work in office, and I suspect this is true for the vast majority of his skeptical voters in the last cycle.
Therefore, I believe there is an enormous amount of voter enthusiasm for Trump in this cycle that was not present in 2016 which will translate to much larger winning margins in the polls than four years ago.