Two Senate Democrats plan to introduce and push for a quick floor vote next week on a resolution expressing no confidence in the leadership of Attorney General Alberto R. Gonzales.

“The time has come for the Senate to express its will,” said Dianne Feinstein of California, a Judiciary Committee member who joined panel colleague, Charles E. Schumer of New York, in announcing the move Thursday. “That will is that we lack confidence in the attorney general.”

Schumer said he expects “large support from both sides of the aisle.”

He said it has the support of both Patrick J. Leahy, D-Vt., Judiciary chairman, and Majority Leader Harry Reid, D-Nev. Schumer acknowledged that Reid had not made any commitment to reserve floor time during a busy legislative week.

In the absence of a unanimous consent agreement, Democrats would need to attract more than the five Republicans who have publicly called for Gonzales’ resignation in order to invoke cloture on the measure. Minnesota’s Norm Coleman became the fifth on Thursday. And, they would need a commitment of a few days of floor time.

John Cornyn, R-Texas, rejected the resolution as an empty gesture: “There’s only two people who get to vote on whether Al Gonzales stays in office. That’s Al Gonzales and the president of the United States.”

Democrats attempted to hold a “no confidence” vote on Donald H. Rumsfeld, the former Defense secretary, during Senate debate on the fiscal 2007 Defense appropriations bill last year. Republicans were able to block a vote on that proposal by a point of order, claiming it wasn’t germane to the bill.

The proposed resolution criticizing Gonzales demonstrates how the Democrats’ campaign against the attorney general has picked up new momentum in the wake of testimony earlier this week by James B. Comey, the former deputy attorney general, regarding a hospital-room confrontation in 2004 involving then-White House counsel Gonzales.

John Conyers Jr., D-Mich., chairman of the House Judiciary Committee, sent a letter to Gonzales on Thursday asking for more details about the warrantless surveillance program to which senators believe Comey was referring during his testimony.

“Mr. Comey’s testimony raises serious questions about the [National Security Agency] NSA program and the White House’s heavy-handed determination to continue it,” Conyers wrote.

“The revelations of Jim Comey have changed things rather dramatically,” said Schumer, who noted that “every day another straw is added to the camel’s back.”

Christopher J. Dodd, D-Conn., introduced a separate resolution Thursday calling on President Bush to immediately nominate new candidates to replace Gonzales and Paul D. Wolfowitz, president of the World Bank.

Also on Thursday, the Senate Judiciary Committee delayed consideration of authorizing a subpoena for Bradley J. Schlozman, a Justice Department official who had been scheduled to testify before the committee on May 15. When the Justice Department said he was unavailable, the Judiciary Committee instead called Comey to testify that day.

Orrin G. Hatch, R-Utah, requested that the subpoena be held over a week, as allowed by committee rules, to give Schlozman a chance to appear voluntarily.

Keith Perine contributed to this story.