For all those right fringe conspiracy theory nuts, here's more on point, 100% relevant data on Biden's role in Ukraine.
Republicans Signed Letter Supporting The Ukraine Reforms Biden Was Pushing
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A bipartisan group of lawmakers echoed then-Vice President Joe Biden’s push for anti-corruption reforms in Ukraine, including within the country’s office of the prosecutor general, according to a 2016 letter unearthed by CNN.
In the letter, Sens. Rob Portman (R-Ohio) and Dick Durbin (D-Ill.), co-chairs of the bipartisan Senate Ukraine Caucus, pressed Ukraine’s then-President Petro Poroshenko to take action on “entrenched corruption” within his government.
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The letter ― also signed by Sens. Ron Johnson (R-Wis.), Mark Kirk (R-Ill.), Chris Murphy (D-Conn.), Jeanne Shaheen (D-N.H.), Richard Blumenthal (D-Conn.) and Sherrod Brown (D-Ohio) ― appears to undermine President Donald Trump’s unsubstantiated claim that there was “quid pro quo” when then-Vice President Biden withheld aid to Ukraine to push the country’s leaders to fire its prosecutor general, Viktor Shokin.
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Biden wasn’t the only person calling for Shokin’s removal from office. Members of Congress (as evidenced by the 2016 letter of support), European leaders and international organizations were all pushing for the notoriously corrupt prosecutor to be fired.
Shokin’s office had opened an investigation into Burisma, but it was dormant by the time Biden was working on anti-corruption efforts in Ukraine. Ukrainian authorities have cleared Biden of any wrongdoing related to Shokin’s firing.
What isn't stated explicitly is that Biden was Obama's VP in 2016 and VP's don't conduct foreign policy (or any other policy) without the approval and direction of the president. Biden may have been the point man in the White House efforts, but make no mistake, he was doing so with the explicit approval of Obama. IMHO, Biden was puffing up his resume in pointing out his role in 2016.
For the record, Biden is not my first choice in the Democratic presidential primary.