He added, "If a president does something which he believes will help him get elected in the public interest, that cannot be the kind of quid pro quo that results in impeachment."
After wide condemnation by Democrats and on social media, Dershowitz said his comments were misinterpreted.
But Schiff declared, "That way madness lies, if we are to accept the president essentially can do whatever he wants."
'Join Us'
The answer to one question posed by Republican senators must have brought joy to the president's ears. Asked whether the president has the best interests of Americans and their families in mind, Trump attorney Eric Herschmann recited a litany of positive economic statistics in what may have sounded like a Trump reelection ad.
"There are more than 7 million jobs created since the election. Illegal border crossings are down 78% since May, and 100 miles of the wall have been built. The unemployment rate is the lowest in 50 years," he said.
Turning to the House managers, he concluded, "Maybe we could even get more done. Let's try something different now. Join us. Join us. One nation, one nation, one people."
Sen. Warren Considers Chief Justice's Position
Sen. Elizabeth Warren, D-Mass., had a sharply worded question for the House managers.
"At a time when large majorities of Americans have lost faith in government, does the fact that the chief justice is presiding over an impeachment trial in which Republican senators have thus far refused to allow witnesses or evidence contribute to the loss of legitimacy of the chief justice, the Supreme Court and the Constitution?"
Schiff answered by first saying, "The chief justice has presided admirably."
He added that the country "does deserve a fair trial," which, for Democrats, means calling witnesses.
"If they don't get that fair trial, it will just further a cynicism that is corrosive to this institution and to our democracy," Schiff said.
Acquittal at Hand?
The Senate is expected to finish the 16 hours of written questions on Thursday night. On Friday, the Senate is expected to convene at 1 p.m. ET and have up to four hours of debate — equally divided between the managers and president's counsels — on whether to consider more evidence or witness testimony.
It is possible that at the end of that debate (or any time during or thereafter), the Senate will go in to closed session for private deliberation on the witness question. Only in closed deliberation can they speak to one another on the floor. There is no time limit for closed deliberations.
If the motion to consider more evidence is approved — a 51-vote majority is required — then senators can offer motions on which witnesses and documents they want to subpoena.
A 50-50 tie fails. Technically, the presiding officer, Roberts, could move to break a tie, but he is not expected to insert himself into a political process.
If the motion fails, there are still any number of procedural motions Democrats could offer, and there is potential for another long series of votes. For example, Democrats could offer motions requesting more time to debate, but these would likely be delaying tactics or protest votes that will not affect the outcome.
When the lawmakers are done debating all motions, the Senate will then vote on each article of impeachment. Those votes could occur as early as Friday evening. Republicans would like Trump to be acquitted by then, but Democrats are working to recruit enough members to support bringing in witnesses to testify.
That effort is flagging, senators say.