He declared early probably to avoid being indicted. I think he's got a long way to go before he's in the clear to run again anyways. Just my opinion.
However, I don't think anyone is going to challenge Trump other than RINO's.
Building upon Roamer's comments around Trump's watch on the fiscal side, I think conservatives need to be reminded of this:
Deficit additon numbers by POTUS adjusted for inflation in what I have calculated with a 1981 Reagan CPI as Benchmark Year....
1. Trump- $1.707T/yr. ($567 B/yr. inflation adjusted)
2. Obama- $1.039T/yr ($372 B/yr. inflation adjusted)
3. GWB- $763 B/yr. ($314 B/yr. inflation adjusted)
4. GWHB- $388 B/yr.($237 B/yr. inflation adjusted)
5. Reagan- $232 B/yr. ($166 B/yr. inflation adjusted)
6. WJC- $174 B/yr. ($86 B/yr. Inflation adjusted)
As you can see, and is what is interesting, is even with inflation adjustment the rankings have not changed, only less pronounced.
The deficit (even inflation adjusted) rose more under Trump's administration than any other since and including Reagan.
And to the detractors to those who state Trump had to deal with Crisis. All of the above minus Clinton had the same in some form or fashion during their administration........