House impeachment manager Rep. Adam Schiff (R-CA) said while it would be "fair" for President Trump to call witnesses at his Senate impeachment trial it would "not be appropriate" for him to call Hunter Biden.
"It would certainly be fair for the president and his team to be able to call witnesses that can provide material information on the charges," Schiff said in an interview on 'CBS Evening News.' "It would not be appropriate for the president to seek to call witnesses merely to try to perpetuate the same smear campaign that was foiled when his plot was discovered."
"Hunter Biden, for example, can't tell us anything about whether the president withheld military aid, whether he withheld that aid to coerce Ukraine to conduct political investigations. Or why he wouldn't meet with the president of Ukraine," Schiff told CBS News' Norah O'Donnell.
"That's an illegitimate abuse of the trial. And the chief justice, who may have an opportunity to rule on the materiality of witnesses, as well as the senators, should not permit that kind of abuse," Schiff also said.
Watch the full segment on Tuesday's 'CBS Evening News':