Although most people were somewhat surprised that Sleepy Joe Biden (having lost several steps) decided to run for president in 2020, the possibility had been there ever since Trump was elected president in 2016, so it’s obvious that president Trump started inquiring about the Biden-Burisma scandal only when the new Ukraine president Zelensky was elected in 2018, whose big campaign promise was to root-out corruption such as by the infamously corrupt Burisma gas company.