Ukraine's lawmaker Sergiy Leschenko addresses journalists in front of Kiev courthouse on May 13, 2019, on the opening day of a hearing considering the case of a possible country's meddling in the US presidential elections in 2016. - On Friday, President Donald Trump's personal attorney Rudy Giuliani said he does not plan to go to the Ukraine to urge the Ukrainian government to conduct a pair of investigations: one on the origins of special counsel Robert Mueller's recently concluded investigation into Russian interference in the 2016 election, the other on the involvement of former Vice President Joe Biden's son in a gas company owned by a Ukrainian oligarch. (Photo by Sergei SUPINSKY / AFP)

Ukraine's lawmaker Sergiy Leschenko addresses journalists in front of Kiev courthouse on May 13, 2019, on the opening day of a hearing considering the case of a possible country's meddling in the US presidential elections in 2016. - On Friday, President Donald Trump's personal attorney Rudy Giuliani said he does not plan to go to the Ukraine to urge the Ukrainian government to conduct a pair of investigations: one on the origins of special counsel Robert Mueller's recently concluded investigation into Russian interference in the 2016 election, the other on the involvement of former Vice President Joe Biden's son in a gas company owned by a Ukrainian oligarch. (Photo by Sergei SUPINSKY / AFP)

Ukraine's lawmaker Sergiy Leschenko addresses journalists in front of Kiev courthouse on May 13, 2019, on the opening day of a hearing considering the case of a possible country's meddling in the US presidential elections in 2016. - On Friday, President Donald Trump's personal attorney Rudy Giuliani said he does not plan to go to the Ukraine to urge the Ukrainian government to conduct a pair of investigations: one on the origins of special counsel Robert Mueller's recently concluded investigation into Russian interference in the 2016 election, the other on the involvement of former Vice President Joe Biden's son in a gas company owned by a Ukrainian oligarch. (Photo by Sergei SUPINSKY / AFP)

Ukraine's lawmaker Sergiy Leschenko addresses journalists in front of Kiev courthouse on May 13, 2019, on the opening day of a hearing considering the case of a possible country's meddling in the US presidential elections in 2016. - On Friday, President Donald Trump's personal attorney Rudy Giuliani said he does not plan to go to the Ukraine to urge the Ukrainian government to conduct a pair of investigations: one on the origins of special counsel Robert Mueller's recently concluded investigation into Russian interference in the 2016 election, the other on the involvement of former Vice President Joe Biden's son in a gas company owned by a Ukrainian oligarch. (Photo by Sergei SUPINSKY / AFP)

Ukraine's lawmaker Sergiy Leschenko addresses journalists in front of Kiev courthouse on May 13, 2019, on the opening day of a hearing considering the case of a possible country's meddling in the US presidential elections in 2016. - On Friday, President Donald Trump's personal attorney Rudy Giuliani said he does not plan to go to the Ukraine to urge the Ukrainian government to conduct a pair of investigations: one on the origins of special counsel Robert Mueller's recently concluded investigation into Russian interference in the 2016 election, the other on the involvement of former Vice President Joe Biden's son in a gas company owned by a Ukrainian oligarch. (Photo by Sergei SUPINSKY / AFP)

Ukraine's lawmaker Sergiy Leschenko addresses journalists in front of Kiev courthouse on May 13, 2019, on the opening day of a hearing considering the case of a possible country's meddling in the US presidential elections in 2016. - On Friday, President Donald Trump's personal attorney Rudy Giuliani said he does not plan to go to the Ukraine to urge the Ukrainian government to conduct a pair of investigations: one on the origins of special counsel Robert Mueller's recently concluded investigation into Russian interference in the 2016 election, the other on the involvement of former Vice President Joe Biden's son in a gas company owned by a Ukrainian oligarch. (Photo by Sergei SUPINSKY / AFP)