Giuliani: Biden not 'smart enough' to be president

President TrumpDonald John TrumpZuckerberg launches public defense of Facebook as attacks mount Trump leaning toward keeping a couple hundred troops in eastern Syria: report Warren says making Israel aid conditional on settlement building is 'on the table' MORE’s personal attorney Rudy GiulianiRudy GiulianiHurd: No Ukrainian officials have told State Department 'they felt like their arms were being twisted' House Democrat pledges 'there will be open hearings' in impeachment inquiry Combatting fake news on social media will take a village MORE said he doesn’t think former Vice President and current 2020 frontrunner Joe BidenJoe BidenZuckerberg launches public defense of Facebook as attacks mount Graham: 'Stupid' for Trump to ask China to investigate Biden Romney: Republicans don't criticize Trump because they fear it will help Warren MORE is capable of being president because he's not "smart enough." 

“I don’t think the guy’s smart enough to be president of the United States,” Giuliani told Hill.TV during an interview that aired on Monday. “I’ve known Joe for a long time.”

The former New York City mayor also doubled down on calls for the Biden family to be investigated. He cited some business dealings by Biden's son, Hunter Biden, that took place in China and Ukraine when his father was still vice president. 

“I also think his activities in Ukraine and China should be seriously investigated,” Giuliani told Hill.TV. “It’s a Democratic press that’s protecting him and they’re actually going easy on him.”

The Biden campaign declined Hill.TV’s request for comment.

Trump allies and conservatives have long claimed that the Biden's have been involved corrupt business dealings. Earlier this year, conservative author Peter Schweizer claimed that Hunter Biden inked a deal with the Chinese government in 2013, just days after then-Vice president Joe Biden visited the country. 

Their concerns also center around whether Joe Biden demanded the resignation of former Prosecutor General Viktor Shokin when Shokin was investigating Burisma, where Hunter Biden was a board member at the time. But Ukraine’s top prosecutor said in May that he found no evidence of wrongdoing.

Both Biden and his son have also shot down the accusations. In an interview with ABC News earlier this month, Hunter Biden directly addressed some of allegations, calling them “demonstrably false," and said they were narratives that have been created by "the right-wing political apparatus."

However, Giuliani said that he hasn’t ruled out a trip to Ukraine to meet with the country’s leaders and ask them to pursue an investigation. 

In May, Giuliani announced and then subsequently cancelled plans to travel to Ukraine to ask the Ukrainian government to look into the origins of special counsel Robert MuellerRobert (Bob) Swan MuellerFox News legal analyst says Trump call with Ukraine leader could be 'more serious' than what Mueller 'dragged up' Lewandowski says Mueller report was 'very clear' in proving 'there was no obstruction,' despite having 'never' read it Fox's Cavuto roasts Trump over criticism of network MORE’s Russia probe and Biden’s past influence in the country.

“I could — I like the Ukraine,” he told Hill.TV. “I think the Ukraine is a great country, I think it is riddled with corruption.”

Giuliani’s comments come amid reports that he helped establish a backchannel with top Ukrainian officials.

Buzzfeed News reported Monday that two U.S. operatives reporting to Giuliani met with Ukrainian officials in an attempt to gather information to use in the 2020 presidential election. They also reportedly sought to push Ukrainian prosecutors to investigate Biden. 

Story updated at 5:00 P.M. EST.

—Tess Bonn