I'm afraid because Trump has absolutely no qualifications to be president. He has no idea what he's doing.
And Barack Obama was Oh, So Qualified? He was a parochial State Senator until he was elected to the Senate, and was 2 1/2 years into the job until he decided to run for President.
Donald Trump has experience as the chief executive of a major multi-national business enterprise. He's got more executive experience than any Presidential candidate in my lifetime, other than Eisenhower.
Obama wasn't as experienced as he could be, but at least he had some experience.
The whole "Trump was an executive" is false equivalency at its best. His "executive" experience has no relevancy to the presidency.
Well to be honest, neither did Obama's moderate amount of experience, given that he served in a non-executive capacity as a junior Senator.
Anyway, as for the whole 'qualifications' thing, it's a good job then that the constitution specifies no actual qualifications for the Presidency other than citizenship and age requirements.
