Thomsen, E: Compliance Biden

Our teacher in Compliance in Luxembourg Banking and Investment Funds Law said: "By all means investigate the Ukrainians. But don't touch the Saudis and Qataris - they have too much money!" He was a famous lawyer working for the government.
So, why are the Democrats so against investigating the actions of Joe Biden, Vice President of the United States, President Obama's point man on Ukraine, and those of his son Hunter Biden, who was appointed to the Board of Burisma Holdings without any experience in Ukraine, energy or specifically oil and gas?