Mark Hamill has the question people should ask about Donald Trump's impeachment

“Star Wars” actor Mark Hamill used his first tweets of 2020 to reveal the “common sense question” that every American must currently consider about the impeachment of President Donald Trump over the Ukraine scandal.

Namely, “why would an innocent man bar witnesses who could exonerate him” from testifying in the Senate’s impeachment trial, asked Hamill.

″#Duh,” he captioned the post.

Senate Majority Leader Mitch McConnell (R-Ky.) is refusing to allow key witnesses, including former national security adviser John Bolton, to testify in Trump’s trial because he sees it “as an opening for uncertainty,” reported The New York Times.

House Speaker Nancy Pelosi (D-Calif.), meanwhile, is presently holding back from transmitting the articles of impeachment to the Senate amid fears of Republican bias in the proceedings. McConnell has previously vowed to work with the White House on Trump’s defense.

Hamill, a frequent critic of the president, earlier advised his 3.5 million followers on Twitter to “buckle-up for 2020: the make-or-break year in which our country either reclaims normalcy or doubles down on the crazy.”

Meanwhile, Stuart Stevens, a top Republican Party strategist in the 2012 election, has torn into the current GOP in a new editorial for The Washington Post in which he lambasted its members for now only standing for what the president has just tweeted.

Stevens noted in the op-ed published Wednesday - titled “Wake up, Republicans. Your party stands for all the wrong things now” - that most Republicans would have until only-recently agreed the party stood for “some basic principles” such as “fiscal sanity, free trade, strong on Russia, and that character and personal responsibility count.”

But now the party “actively opposes” those issues, he explained.

“Republicans are now officially the character doesn’t count party, the personal responsibility just proves you have failed to blame the other guy party, the deficit doesn’t matter party, the Russia is our ally party, and the I’m-right-and-you-are-human-scum party,” said Stevens, who is now working with a political action committee backing former Massachusetts Gov. Bill Weld’s (R) run against Trump’s 2020 reelection.

“Yes, it’s President Trump’s party now, but it stands only for what he has just tweeted,” he added.

Stevens said the impeachment of Trump over the Ukraine scandal “and all that has led to it should signal a day of reckoning.”

“A party that has as its sole purpose the protection and promotion of its leader, whatever he thinks, is not on a sustainable path,” he wrote, later adding: “I’d like to say that I believe the party I spent so many years fighting for could rise to the challenge of this moment. But there have been too many lies for too long.”

Read the full editorial here.

• This article originally appeared on HuffPost.