Former Rep. Trey Gowdy (R-S.C.) said the House hearing featuring President Trump's longtime attorney and fixer Michael Cohen was "utterly useless."

On "Fox and Friends" Monday, Gowdy, a former federal prosecutor and current Fox News contributor, also reacted to top House Democrats Jerrold Nadler and Adam Schiff accusing President Trump of obstructing justice and colluding with Russia.

House Judiciary Committee Chairman Jerrold Nadler, who would oversee any impeachment proceedings, said Sunday he will send more than 60 document requests to the White House and Justice Department.

"It's very clear that the president obstructed justice," Nadler told ABC News anchor George Stephanopoulos. 

Meantime, in a separate interview, House Intelligence Committee Chairman Schiff said he believes there is "direct evidence" of collusion between the Trump campaign and Russians in 2016.

"What we learned this past week is just how utterly useless public congressional hearings are," Gowdy said, explaining that such hearings only allow members five minutes for questions. 

He emphasized that Cohen is not a reliable witness and is not being used by federal prosecutors or by Special Counsel Robert Mueller.

"Cohen is not being used as a witness by Southern District of New York. He is not being used as a witness by Mueller, yet Congress thinks he is good enough, not only to use as a witness, but kick off the case against President Trump," said Gowdy. 

He said the hearing and the new pronouncements by Nadler and Schiff are "all about 2020" and Democrats trying to damage Trump politically. Gowdy said the 2016 Trump Tower meeting is not evidence of collusion on its own. 

"If getting negative information from Russia is tantamount to a crime, whoever dealt with Christopher Steele needs to go hire a lawyer," he said, referring to the author of the Trump-Russia dossier.