Sen. Lindsey Graham, R-S.C., the chairman of the Senate Judiciary Committee, says Donald Trump Jr. should ignore the subpoena issued to him by the Senate Intelligence Committee.

“If I were Donald Trump Jr.’s lawyer, I would tell him, ‘You don’t need to go back into this environment anymore,’” Graham said in an interview with Fox News’ Maria Bartiromo on Sunday. “‘You’ve been there for hours and hours and nothing being alleged here changes the outcome of the Mueller investigation.’ I would call it a day.”

Last week, the Republican-led Senate Intelligence Committee subpoenaed Trump Jr., the president’s eldest son, to answer more questions about his contacts with Russia. Trump Jr. is reportedly resisting the subpoena and may invoke his Fifth Amendment right to refuse to answer questions.

The panel is seeking to question Trump Jr. about congressional testimony he gave in September 2017 about a plan to build a Trump Tower in Moscow — testimony that was later contradicted by former Trump attorney Michael Cohen.

19 PHOTOS Donald Trump Jr. See Gallery Donald Trump Jr. Donald Trump, Jr., son of US President Donald Trump, attends the 139th White House Easter Egg Roll on the South Lawn of the White House in Washington, DC, April 17, 2017. / AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images) Donald Trump's son Donald Trump Jr. arrives to speak during the second session of the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Mike Segar Donald Trump Jr. speaks about his father, Republican Presidential nominee Donald J. Trump, at the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Mario Anzuoni Donald Trump Jr. pumps his fist after speaking about his father, Republican U.S. presidential nominee Donald Trump, during the second day at the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Mike Segar Donald Trump Jr. speaks about his father, Republican Presidential nominee Donald J. Trump, at the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Jim Young Donald Trump Jr. speaks about his father, Republican Presidential nominee Donald J. Trump at the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Mario Anzuoni Donald Trump Jr. speaks about his father, Republican U.S. presidential nominee Donald Trump, during the second day of the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Mike Segar Donald Trump Jr. speaks about his father, Republican U.S. presidential nominee Donald Trump, during the second day of the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Mike Segar Donald Trump Jr. and his wife Vanessa attend the second day session at the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Jonathan Ernst Donald Trump Jr. speaks about his father, Republican U.S. presidential nominee Donald Trump, during the second day of the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Mike Segar Tiffany Trump. daughter of Republican U.S. presidential candidate Donald Trump, sits near her half-brother Donald Trump Jr. (C) during evening speeches at the Republican National Convention in Cleveland, Ohio, U.S. July 18, 2016. REUTERS/Jonathan Ernst Republican U.S. presidential candidate Donald Trump (L) smiles as his son Donald Trump Jr. speaks for a moment at a campaign rally in St. Clairsville, Ohio June 28, 2016. REUTERS/Aaron Josefczyk Donald Trump Jr, son of Republican U.S. presidential candidate Donald Trump, tours the arena at the Republican National Convention in Cleveland, Ohio, U.S. July 19, 2016. REUTERS/Mark Kauzlarich Donald Trump Jr. (R) kicks balloons into the crowd as Republican U.S. presidential nominee Donald Trump and vice presidential nominee Governor Mike Pence stand with their families onstage at the end of the final session of the Republican National Convention in Cleveland, Ohio, U.S. July 21, 2016. REUTERS/Jonathan Ernst Donald Trump Jr with his children arrives at Joint Base Andrews outside Washington, U.S., after Easter weekend in Palm Beach, Florida, April 16, 2017. REUTERS/Yuri Gripas Donald Trump Jr. (R) makes remarks at a press conference while Joo Kim Tiah (C) the CEO of TA Global, the owner and developer of Trump International Hotel and Tower Vancouver, looks on with Eric Danziger the CEO of Trump Hotels (L) during the grand opening of the Trump International Hotel and Tower in Vancouver, British Columbia, Canada February 28, 2017. REUTERS/Nick Didlick U.S. President Donald Trump and his son Donald Trump, Jr., watch children roll Easter Eggs at 139th annual White House Easter Egg Roll on the South Lawn of the White House in Washington, U.S., April 17, 2017. REUTERS/Joshua Roberts Donald Trump, Jr., and Ivanka Trump arrive for the Presidential Inauguration of Trump at the U.S. Capitol in Washington, D.C., U.S., January 20, 2017. REUTERS/Saul Loeb/Pool BOZEMAN, MT - APRIL 22: Donald Trump Jr. speaks at a rally for Republican Greg Gianforte as he campaigns for the Montana House of Representatives seat vacated by the appointment of Ryan Zinke to head the Department of Interior on April 22, 2017 in Bozeman, Montana. Gianforte is running against democrat Rob Quist in the special election to be held on May 25, 2017. (Photo by William Campbell/Corbis via Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

“Anything based on what Michael Cohen said is worthless testimony,” Graham said. “Michael Cohen is a worthless witness.”

President Trump told reporters he was “very surprised” that the Senate Intelligence Committee would issue a subpoena for his son, and questioned why the committee’s co-chairman, Sen. Richard Burr, R-N.C., would pursue the matter after special counsel Robert Mueller’s report on Russian interference in the 2016 election concluded that there was not enough evidence to charge Trump or members of his campaign with conspiracy.

“I saw Richard Burr saying there was no collusion two or three weeks ago,” Trump said. “I was very surprised.”

He added: “My son’s a very good person. Works very hard.”

___

Read more from Yahoo News: