Here's a list of abuse of power of the Presidency from GOP.  NONE involve seeking help from a foreign power to undermine the United States Democracy / Election in 2020.

Obama - "Fast and Furious"

Reagan - "Iran Contra"

GOP 's Buck's list of Presidential abuse is set forth below.  It proves Tweety Trump exceeded the standard for abusing Presidential powers to the level of impeachment.  Sorry, Rep Buck, you blew it.

"Rep. Ken Buck lists past presidents' 'abuses of power' Trump critics should consider impeachable"
By Charles Creitz | Fox News 

https://www.foxnews.com/politics/republican-lists-impeachable-offenses-past-presidents-trump-turley-hearing.amp

"Rep. Ken Buck, R-Colo, criticized Democrats and proponents of impeaching President Trump Wednesday, claiming their overbroad definition of an impeachable offense and "abuse of power" would have decimated the ranks of the presidency if applied in the past.

Buck, a member of the House Judiciary Committee, invoked his preceding questioner on the panel, Rep. Ted Deutch, D-Fla., who had claimed Trump abused the power of the presidency.

Deutch claimed Trump's alleged abuse amounted to attempting to "use that power to cheat in our elections."

"He abused the power that we trusted him with for personal and political gain," Deutch claimed. "The founders worried about just this type of abuse of power."

In response, Buck turned to George Washington University Law Professor Jonathan Turley and recited a litany of examples of alleged "abuse of power" by Trump's predecessors.

"Congressman Deutch just informed us the FDR put 'country first'," he said. "Franklin Delano Roosevelt, when he was president, directed the IRS to conduct audits of his political enemies, namely Sen. Huey Long, William Randolph Hearst and [former Rep.] Hamilton Fish, [and] Father [Charles] Coughlin."

Turley responded that those acts would likely "be subsumed" into the broad definition of impeachable conduct others had set.

The professor offered similar answers to Buck's other examples, including a claim that former President Lyndon Johnson wiretapped Sen. Barry Goldwater's campaign plane during the 1964 presidential election and enlisted a CIA spy to infiltrate Goldwater's camp."

Significant points by Buck, but none sought help from a foreign power to win an election, not did they obstruct testimony.

""John F. Kennedy directed his brother, Robert Kennedy, to deport one of his mistresses as an East German spy," Buck added, before claiming that former President Barack Obama committed similar abuses of power by declaring the U.S. Senate to be in "recess" so he could make appointments to the National Labor Relations Board -- an action which the Supreme Court later unanimously ruled to be unconstitutional.

Buck also claimed Obama abused his power in his handling of the aftermath of the 2012 Benghazi attack that left four Americans dead, including then-Ambassador J. Christopher Stevens.

The congressman also noted that former President Abraham Lincoln had sent federal troops to Frederick, Md., to arrest pro-Confederate Maryland legislators while they sat in a session at the Washington suburb.

Buck said the Lincoln administration didn't want Maryland to secede from the Union, as Washington D.C. would have been surrounded by the Confederacy. Those actions came after a Union regiment from Massachusetts was attacked by Confederate sympathizers while passing near Baltimore during a southward march."

It is useful to bring up these examples of how Presidents exercise power, but NONE equal Trump seeking foreign help to in the election in 2020.  Where shall the House set the standard for future Presidents, as Tweety trump bullies and brines Ukraine to help him dig dirt, real or manufactured, machts nichts, or at least announce they are investigating dirt on Biden.. 

Following the facts and evidence, objectively, ignoring the superfluous alibis, emotional whining, and truly non-substantial commentary, WE ALL KNOW Tweety Trump decided to hurt and beat down Ukraine because many leaders in Ukraine did not want Trump to win in 2016, and they said it in PUBLIC, not thru fake Google accounts and other propaganda.

Ukraine leaders liked / LIKE Hillary.  GUESS WHAT?  So do many other world leaders, and they said so publicly in 2016!

Tweety trump had no way to hurt the strong European countries in any significant way.  A small critical country under attack from Russia became Tweety's target.  Tweety Trump likes to prey on weaker people and countries.

Tweety Trump is the ideal bully.  TWEETY ALWAYS PUNCHES DOWN.  He doesn't have to bully people, TWEETY LIKES TO BULLY PEOPLE.  HE IS A SICK PERSON.

If anyone punches Tweety in the nose, criticizes him in any way, he gives them a nick name and slanders them, and is a true MEAN GIRL!

Tweety Trump started his vendetta against Ukraine the day after the Mueller Report was published.  Tweety knew Barr would white wash the report-Barr is his butt boy servant.  As I've said, Tweety "courtesans," surrogates, supporters, GOP act like cult followers in ignoring what is obvious! 

Very soon, perhaps the day after the Mueller report was published, AFTER PROOF RUSSIA HELPED TWEETY  TO WIN IN 2016, Tweety called Ukraine!