If Trump withheld military aid to Ukraine in exchange for Zelensky announcing an investigation into Trump’s political rival, would that action be impeachable?

Yes, it is impeachable, it has been proven, and Trump will be impeached!  The smoking-gun is the July 25th call-memo-transcript, with full back-story provided by the extremely-credible top officials and diplomats in open-hearing testimonies.  Trump solicited foreign interference in our upcoming elections (under Ukrainian duress) against a political rival, for his own personal advantage, which constitutes Bribery/Extortion.  There is an avalanche of evidence in spite of Trump’s insistence on perfect behavior, and his blatant refusal to provide any information subpoenaed by Congress, in addition to ordering the Executive branch NOT to cooperate with a separate but equal branch of government  ….. he has laid the groundwork for the Impeachment Articles: Bribery, Obstruction of Justice, Contempt of Congress, and Betrayal of his Oath of Office (to protect and defend us from powers, foreign and domestic).  America is NOT a monarchy or a dictatorship; the president is NOT above the law.    The Constitution is the supreme law of our land!

Trish Forsyth Voss