Just maybe Donald Trump wanted to take over one of the political parties ever since he was a child. Well that didn't make sense because we all know that Donald is a child. But lets say that Donald was determined to go after one of the political parties but then Donald realized that HE COULD NOT SUCCEED in aiming for the Democrat party because the democrats were too strong. Remember, Donald was once a democrat himself and aligned with all that goes along with being a democrat like pro-choice and etc etc.
Donald realized that the party ripe for a takeover was the republican party. Because like Trump, republicans pretend to have morals yet they have none, and republicans pretend to be fiscally conservative yet they are not, and republicans pretend to be concerned about the social issues yet they gladly cut social programs to the bone when they cannot kill off altogether. So it was an easy choice for Donald Trump, go after the republican party. And thus Trump did, and thus Trump easily succeeded just as he had expected.
So it was not exactly rocket science for someone to take over the republican establishment, all it took was someone who wanted to. And Donald Trump was that someone who wanted to. But remember.... Trump could have never tried this on the democrats. Even Donald Trump was smart enough to realize THAT.
Get the point??? Republicans are weak, ignorant, petty, lacking of morals, and out to screw the little guy. Democrats on the other hand actually care, actually try, and actually succeed because they do what Americans want i.e. affordable healthcare, affordable housing, decent waged jobs, consumer protections, clean air, clean water, affordable education, equality for all, and everything that democrats have given to America society despite republican obstruction after obstruction. Yeah.... Donald Trump knew which party were the pushovers.