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Ukraine’s top prosecutor has reopened an investigation into the Burisma gas company that reportedly paid Joe Biden’s son, Hunter, $3 million in salary and bonuses.

“We are now reviewing all the cases that were closed or split into several parts or were investigated before,” said Ukraine’s Prosecutor General Ruslan Ryaboshapka, according to DailyMail.com.

Ukraine’s former prosecutor who launched a probe into Hunter Biden’s involvement with Burisma was reportedly fired under pressure from then-Vice President Joe Biden.

The investigation into possible corruption by Joe and Hunter was reopened hours after U.S. President Trump asked Ukraine for assistance investigating the Bidens, saying the country “should investigate” Joe and Hunter Biden.

Trump is on the hot seat for asking a foreign government to help investigate his political rival.

House Speaker Nancy Pelosi announced an official impeachment inquiry into Trump’s phone call with Ukrainian President Volodymyr Zelensky, in which Trump asked Zelensky for information on the Bidens.

House Democrats are looking into whether Trump threatened to withhold military aid to Ukraine if the government didn’t comply with his wishes.

Trump reportedly fired the U.S. ambassador to the Ukraine after Rudy Giuliani complained she would not launch an investigation into the Bidens.

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In an interview with The Associated Press, President Zelensky denied he was pressured by Trump to investigate Joe Biden and his son.

Asked by The Associated Press about Trump’s comment Thursday that the U.S. has an “absolute right” to ask foreign leaders to investigate corruption cases, Zelensky said that Ukraine is “open” and that all the cases under investigation are “transparent.”

The Bidens are accused of influence peddling by using Joe’s position as Barack Obama’s vice president to enrich himself and his son.

Hunter reportedly received $1.5 billion from the Chinese government, in addition to $3 million from Burisma gas company and untold millions from other foreign governments while Joe was VP.