Do you really expect Trump will appoint a statistic chief that will always report low numbers so there is no chance they'll ever have to revise the numbers down? Every administration will want to publish higher job numbers rather than a lower number. As long as there is an error margin anyone appointed by the current administration will report the upper limit. As long as that is backed up by real data and not made up numbers it is expected to some degree and the number provides has some use.
If you have a closer look at what the US Bureau of Labor Statistic publishes you'll see that they currently provide an estimate for July 25 and list the numbers along with the 90% confidence interval and even show a nice chart where you can see the confidence interval graphically.
So e.g. for the total no farm jobs they say their current best guess is 73k and with a probability of 90% the real number is somewhere between -62.8k and +208k. I'd totally expect any politician talking about this number to say 'We had a big increase in job numbers, non farm jobs alone might have been increased by more than 200k' and that would not be a lie even if the reality might turn out to be a loss of jobs.
Anyone saying "they got their numbers wrong" when more data is available and the report is updated doesn't understand how statistic works and should be laughed at when they talk about it in public.