As a very serious political pundit, who followed every minute of the Primary and Presidential debates, I can tell you straight that Trump's position regarding non-involvement or not, was a very minor, irrelevant part of his campaign. His platform, as I stated, was Isis, illegal immigration, jobs and the economy and the only thing that he has not fulfilled is building a southern wall, that is because the Democrats are blocking the funding. The only reason that he has not yet left Syria, is because of the recent poison gas attacks, which affected the strategy.
You are a little uninformed regarding US taxes. Due to deductions like earnings level, child credits, home mortgage deductions, etc, sixty percent of Americans pay no taxes at all. The major changes just effected, have no 'slashing' of any kind. Everybody in every category benefited, rich and poor. ( why do you feel that taxes should be designed to be punitive to any group?). The most important feature of the tax bill, is the lowering of the Corporate Tax rate, which helps the US be more competitive worldwide. This alone has already created jobs due to businesses expanding and has also started a wage raise phase.
Hillary Clinton is, in my opinion, one of the most despicable Americans ever, narrowly beaten by Charles Manson. She has been a criminal all of her life, starting when she was a young lawyer and was involved in the Whitewater real estate scam. She has used her position to thumb her nose at the law every day. The evidence appears to show, that the Clinton Foundation actually extorted money from foreign governments when she was Secretary of State. Foreign governments were making $50,000,000 donations to the foundation and the next week, their representative would get an interview with Clinton, followed by some request being approved. The Clintons take eighty percent of the Foundations income for personal expenses. Right now, the Inspector General at the Justice Dept, is investigating her for allowing Top Secret documents to be kept on her unsecurephone and those of her staff. Very serious stuff. Several low level, military guys have gotten prison sentences for similar things. Let's see if she can corrupt this investigation. Of course, if she's found guilty, it will be because she's a woman or its rascist.