Hillary Clinton Hillary Diane Rodham ClintonThe Memo: Trump furor stokes fears of unrest Bloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close MORE on Thursday tweeted a link to a website with information and arguments in support of impeaching President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE, urging her followers to spread the information to friends and family.

The 2016 Democratic presidential nominee said that Trump "must be held accountable" for his efforts to convince Ukraine's president to open an investigation into former Vice President Joe Biden Joe BidenBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Joe Biden should enact critical government reforms if he wins MORE, a top contender for the Democratic Party's 2020 nomination.

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"Make sure your family and friends see the evidence for themselves: The president asked a foreign power to interfere in the 2020 election for his own political gain," Clinton tweeted.

"Americans deserve free and fair elections. He must be held accountable," she added.

Make sure your family and friends see the evidence for themselves:



The president asked a foreign power to interfere in the 2020 election for his own political gain.



Americans deserve free and fair elections. He must be held accountable. https://t.co/ul8GzrsOKG — Hillary Clinton (@HillaryClinton) December 12, 2019

The former secretary of State is a vocal supporter of the House impeachment inquiry, which advanced this week as Democrats unveiled two articles of impeachment against Trump over his dealings with Ukraine.

Clinton called the inquiry "unavoidable" in October after a readout of Trump's July 25 phone call with Ukrainian President Volodymyr Zelensky was released. The document showed Trump urging the foreign leader to launch probes into the Bidens and the 2016 election.

"I think it became absolutely unavoidable when the summary of the phone call came out plus the whistleblower complaint," she said during an interview on "The View."

Democrats have accused Trump of abusing his power by asking Ukraine to launch politically charged investigations while holding up military aid for Ukraine that was approved by Congress. Democrats have also accused Trump of obstruction of Congress by refusing to comply with the inquiry itself.

Trump has blasted the inquiry and called on the Senate to quickly finish a trial, which is expected to begin once the House votes on the articles later this month.

Senate GOP leaders have signaled they don't expect the trial to begin until January.