Senator Jeff Flake (R-Ariz.) is defending his call to delay the confirmation of Supreme Court nominee Brett Kavanaugh until there is an FBI investigation into the alleged assault that is 'limited in scope'.
It comes as Mr Trump earlier said he wants the FBI to conduct a comprehensive and quick investigation into sexual misconduct allegations against his US Supreme Court nominee Brett Kavanaugh, but said he did not want to see a "witch hunt".
"I think it's very unfair to bring up things like this", Mr Trump said.
I have been watching and listening to our elected Democratic Senators in Washington acting as judge and jury in these hearings, as they created a climate of hatred and innuendo where I would be surprised that any wife or mother would want their husband or son to run for public office.
University professor Christine Blasey Ford has said Judge was a witness when Kavanaugh allegedly sexually assaulted her at a party in 1982 when they were high school students in Maryland.
What is likely happening, Collins said, is a balance between rushing the investigation (appearing like it's all a show) and taking too long (allowing more allegations to emerge).
Flake is retiring after his one six-year Senate term.
But Democratic Sen. Mazie Hirono of Hawaii, a Judiciary Committee member, doubted how credible the investigation will be, given the time limit.
On Monday, Senate Majority Leader Mitch McConnell said the Senate would vote this week on whether to confirm Judge Kavanaugh to the Supreme Court.
A White House official, speaking on condition of anonymity, told Reuters on Sunday the investigation would start off with interviews with only four people. "The FBI needs to effectively be able to do its job and provide the information that the White House needs". She said Judge and Kavanaugh were both drunk at the time.
The change in direction came after numerous reports indicated the Federal Bureau of Investigation was declining to talk to witnesses who could corroborate the women's claims, after being given a list of only four people that it could interview-Mark Judge, who Ford says was in the room during her alleged assault; Leland Keyser and P.J. Smyth, who were present at the party where it took place; and Deborah Ramirez, who has alleged a separate assault in college. Mr Trump said, mentioning a term he has used in the past to denigrate Special Counsel Robert Mueller's investigation of Russia's role in the 2016 USA presidential election. Trump said. "You have to stay within reason". Judge has also denied misconduct allegations.
Mr Trump has called Mr Kavanaugh a good man who has been treated unfairly. Absolutely. I have a very open mind. While saying that youthful drinking should not condemn a person for life, Ludington said he was concerned about Kavanaugh's statements under oath before the Senate Judiciary Committee. Many also consider the allegations a mere delay tactic by Democrats to delay a vote until after the potential "blue wave" in the November election which could give the current minority party control of the House and Senate.
U.S. Supreme Court nominee testifies that he does not have a drinking problem.
The Kavanaugh nomination erupted last month into a major controversy that jeopardized an effort by Trump and his fellow Republicans to cement conservative dominance of the nation's highest court and push America's judiciary to the right.