Dershowitz says Democrats "completely failed" on impeachment

What they're saying: "I think they presented the strongest case they could present on their facts, but they didn’t come close to alleging impeachable offenses," Dershowitz argued.

• "They completely failed to meet that high constitutional standard and, therefore, it would be unconstitutional to remove a president based on the allegations that were made against them in the articles of impeachment," he added.

Shot/chaser: Fox News host Chris Wallace confronted Dershowitz over comments he made in the 1999 impeachment trial against Bill Clinton that argued a crime was not needed for impeachment.

• Dershowitz acknowledged the past remark but rebutted: "I’ve been immersing myself in dusty old books and I’ve concluded that, no, it has to be a crime."