Multiple guests on the Sunday morning political talk shows weighed in on the expected testimony of U.S. Ambassador the European Union Gordon Sondland Gordon SondlandGOP chairman vows to protect whistleblowers following Vindman retirement over 'bullying' Top Democrat slams Trump's new EU envoy: Not 'a political donor's part-time job' Trump names new EU envoy, filling post left vacant by impeachment witness Sondland MORE, who is expected to appear on Capitol Hill this week as part of the Democrats' impeachment inquiry into President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE.

Republican guests also defended the president, who last week attacked a witness on Twitter as she testified publicly in the probe.

Read The Hill's complete coverage below.

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