With polls showing most Americans disapprove of the job Trump is doing, and consider his time in office to be a failure (at least so far), it's probably a good thing (for Trump) that he has several years to right his political ship (assuming nothing impeachable is found in his relations with Russia during the 2016 campaign).
A new Fox News Poll (done between April 23rd and 25th of a random national sample of 1,009 registered voters, with a 3 point margin of error) decided to see just how Trump stood with the voters in terms of electability. And what they found was not good for Trump.
Only 36% of registered voters say they would vote for Donald Trump if the 2020 election for president was held right now. A majority of 55% said they would vote for someone else (and 8% said they were unsure).
Unless Trump can rehabilitate his political image among the public, he is looking like a one-term president.