But given the circumstances surrounding the impeachment probe - which is centered on Trump's efforts to get a foreign power to investigate Biden's son - it took Biden a while to come around to it. "Wait until we get to Romania", he said waving his tablet, suggesting that he had the information there. But in an afternoon tweet, Trump significantly understated the public support for his impeachment found in recent polling.
Beijing-based Megvii Technology - one of 28 Chinese entities blacklisted by the US Commerce Department over allegations of human rights violations in China's Xinjiang province - is now reportedly linked to Hunter Biden, the son of former US Vice President and Democratic presidential nominee Joe Biden.
Trump has been waging a disastrous trade war with China, one he said almost two years ago would be easy to win.
In another tweet, Trump dismissed the impeachment process as a Democratic bid to influence the election, saying "their total focus is 2020, nothing more".
Nonetheless Trump, who broke with precedent by campaigning for reelection nearly from the moment he took office in 2017, is himself pouncing on the impeachment because the brand new cornerstone of his 2020 effort.
Even if the House impeaches Trump, it remains unlikely that the Republican-led Senate would convict him in the subsequent trial.
Nonetheless, Trump's already turbulent presidency would be forever connected with the impeachment.
Presidential candidate Sen. Cory Booker (D-NJ) said if President Trump continues his attacks against former Vice President Joe Biden with regards to Ukraine, he is going to have to go through him.
A transcript of the conversation released by the White House shows Trump repeatedly pushed Zelensky to investigate former Vice President Joe Biden and his son, Hunter. Trump says there was no quid pro quo and that his only desire is to combat corruption.
"By the way, likewise, China should start an investigation into the Bidens because what happened in China is just about as bad as what happened with Ukraine", Trump told reporters. And the European Union and the International Monetary Fund, along with several congressional Republicans, shared the Obama administration's view of Shokin as corrupt. House Intelligence Committee Chairman Adam Schiff said he would consider it "additional strong evidence of obstruction".
"That's where we decide who leads us".
Biden and his family were the subject of an effort by Trump to request political assistance from the government of Ukraine that was connected to USA military assistance and offers of engagement with Trump himself.