Yes, it seems possible that the Trump administration will actually tamper with public data records. Trump seems to be mostly concerned with his image and how other perceive him. He's constantly lashing out at the media and claiming that they are out to get him and that they are reporting inaccurate facts. It does not seem out of the realm of possibility that Trump would manipulate figures.
Liberals these days are really that afraid if him? Really? They will do anything to fearmonger and stir up other people to get more votes in 2020. They will do anything to sabotage Trump so that his presidency becomes a trainwreck. And their attempts aren't even going to work! HA!
The question implies that Trump will change data results (possibly illegally) to make himself look better. No, he probably will not do this. That being said, he will likely spin the data to cast the best possible light on his administration. But this is no different than any other president. Name one president who has not, particularly in his first term, spoken with complete candor about his failings and not not tried to place blame on someone else for those failings.
Trump's administration probably will manipulate statistics for their own gain.However, they probably won't tamper with public data records.This is because if they are found doing so, it will create a huge backlash.They will lose a lot of public approval.They will not risk losing so many potential voters.They will however bring up statistics that are dubious.
The Trump Administration will not tamper with public data because it does not have to. This is nothing new. Every Administration will point to data that supports their narrative, create data that supports their narrative or simply dismiss negative data. That is what has happened leading up to the Trump Administration and will continue in his Administration.