Then it boils down to lies as necessary for an election, because voters don't like reality. Wages are still flat for the vast majority of taxpayers, their debt is rising, and the national debt is rising. How can this be in a booming economy? The reality is the economy isn't booming... it's just the stock market which favors those that are already wealthy.
GDP growth has already been adjusted downward for 2020, and all the tax cuts did is increase the national debt. How does one fix that? a) increase taxes. b) decrease spending, or c) ride the coattails of a booming economy (e.g., the Clinton years). Voters don't want to hear (a), for (b) it can be political suicide if one picks the wrong cuts, and (c) is out of the question. Good luck to all the candidates in 2020 
Looks like the new budget has 4.4 TRILLION in cuts in all the right places. Looks like you are in store for 5 more years of TDS.
Also above you mentioned about having witnesses in the Senate or lack thereof, which you claimed was unconstitutional.
Unfortunately that is 100 incorrect. The brilliant framers of the Constitution foresaw so many problems we would encounter and made sure power could not be accumulated in total by anyone branch.
Under current rules, the actual impeachment inquiry begins in the Judiciary Committee of the House of Representatives. That Committee holds hearings, takes evidence, and hears testimony of witnesses concerning matters relevant to the inquiry. Typically, there will also be a Minority Counsel who serves the interest of the party not controlling Congress. (which the House prevented this time with their secret basement hearings)
Witnesses are interrogated by the Committee Counsel, the Minority Counsel, and each of the members of the House Judiciary Committee. The Committee formulates Articles of Impeachment which could contain multiple counts. The Committee votes on the Articles of Impeachment and the results of the vote are reported to the House as a whole. The matter is then referred to the whole House which debates the matter and votes on the Articles of Impeachment, which may or may not be changed. If the Articles of Impeachment are approved, the matter is sent to the Senate for trial.
The trial in the Senate is handled by "Managers" from the House of Representatives, with the assistance of attorneys employed for the prosecution of the impeachment case. The Senate sits as a jury. (In the past the Senate has heard judicial impeachments by appointing a subcommittee especially for that purpose, which then reports its findings to the Senate as a whole.) The Senate would then debate the matter, and vote, each individual Senator voting whether to convict the President and remove him from office, or against conviction. If more than two-thirds of the Senators present vote to convict, the President would be removed from office. Thus a Senator who abstained from voting but was present would in effect be voting against conviction. (Article I § 3)
TLDR - the Senate is not responsible for helping to prove the charges brought by the House. There is no expectation for additional witnesses as the case should have been ironclad when it was voted on and left the house. If it was not, that is 100% on the House.
Maybe they will get it right next time when they try to impeach the President again, undoubtedly they will as they no nothing else but wasting time and money.