WASHINGTON – The Democratic senator leading the inquiry into the dismissal of federal prosecutors insisted on Sunday that Karl Rove and other top aides to President Bush must testify publicly and under oath, setting up a confrontation between Congress and the White House, which has said it is unlikely to agree to such a demand. Some Republicans have suggested that Rove, as well as Harriet E. Miers, the former White House counsel, and William K. Kelley, the deputy White House counsel, testify privately, if only to tamp down the political uproar. But Sen. Patrick J. Leahy, the Democratic chairman of the Senate Judiciary Committee, seemed to rule out such a move on Sunday, saying that his committee would vote Thursday to issue subpoenas in the inquiry, which centers on whether the White House allowed politics to interfere with law enforcement. “I do not believe in this, `We’ll have a private briefing for you where we’ll tell you everything,’ and they don’t,” Leahy said on “This Week” on ABC, adding: “I want testimony under oath. I am sick and tired of getting half-truths on this.” Lawmakers in both parties agree that the fate of Attorney General Alberto R. Gonzales may rest on what happens this week, as the White House and Congress either come to blows – or find a compromise – over the testimony lawmakers are demanding. With Bush at Camp David, the White House counsel, Fred F. Fielding, spent the weekend in Washington weighing whether to allow Rove and the others to talk and, if so, under what conditions. In response to Leahy’s comments on Sunday, Tony Snow, the White House press secretary, said that the administration was standing by its earlier promise that Fielding would give Democrats an answer on Tuesday. “Fred has been talking with folks on Capitol Hill, analyzing various statements and conversations with folks on the Hill, and we will get back to them,” Snow said in a brief telephone interview.