Senate Republicans are beginning to set up a firewall for President Trump against special counsel Robert Mueller’s report, pushing back at a slew of Democratic attacks on the president’s conduct as described in the document.

Sen. John Cornyn (R-Texas) on Monday set the tone for his caucus’s rank and file, signaling the GOP will join the White House in casting Democratic attacks emanating from the Mueller report as being all about the 2020 campaign.

“If this were legitimate oversight, that would be one thing, but I think this is more like harassment and it’s all politics,” said Cornyn, formerly the No. 2 Republican in the Senate. “Obviously Democrats were very disappointed in the Mueller report and they’re not willing to accept the conclusions and move on.”

Sen. Chuck Grassley (R-Iowa), a senior member of the Judiciary Committee, said House Democratic subpoenas and demands for senior administration officials to testify are unnecessary because “the president already gave a million pages to oversight,” referring to Trump’s order to the director of national intelligence and the Justice Department to declassify Russia-related documents.