Trump responded to comments by House Judiciary Committee member, Rep. David Cicilline, D-R.I., that Mueller was tentatively scheduled to testify on May 15 about his report on potential collusion with Russian Federation and obstruction of justice by the president and his campaign during the 2016 presidential election.
Trump said on Twitter that Democrats in Congress were seeking a "redo" of Mueller's report, which declined to conclude whether the president's efforts to impede the investigation constituted obstruction of justice.
Trump's call that Mueller not testify comes after Rep. David Cicilline (D-RI) said Sunday that a tentative date of May 15 was set for the special counsel to testify before the House over his investigation.
Escalating tensions with House Democrats as they seek to bring Mueller before the House Judiciary Committee, Trump tweeted: "no redos for the Dems". Mueller and McGahn "will testify". But Barr has said he has no objection to Mueller testifying.
The attorney general has been widely criticized by Democrats and some conservatives for how he has handled the release of Mueller's findings.
Cicilline, who is a key member of the committee, told Fox News Sunday that Mueller may testify on May 15.
"The White House has so far indicated they would not interfere with Mr. Mueller's attempt to testify", Cicilline said during his Fox appearance - before Trump's tweets opposing Mueller's testimony. Since the release of the redacted report, there have been open conflicts between Mueller's team and Barr about the investigation's conclusions. "Before the American people", Democratic Rep. Adam Schiff of California, the chairman of the House Intelligence Committee, said on Twitter.
Cicilline later tweeted that "nothing has been agreed to yet". "The American people deserve the truth".
Mueller's testimony will be the most hotly anticipated Capitol Hill must-see TV since last week's Senate hearing with Attorney General Bill Barr.
Convinced that Attorney General Barr also "misled" Congress on the subject of obstruction of justice, CNN reports, Democrats are also interested in asking Mueller how he feels about Barr's interpretation of his report, both in a letter issued the weekend Mueller's report was completed, and in subsequent statements Barr made to lawmakers.