WASHINGTON (AP) — Chuck Hagel secured the necessary votes for the U.S. Senate to confirm him to be the next defense secretary barring any new, damaging information, after a longtime senator said he would support him, paving the way for a vote next week that will end the bitter fight over President Barack Obama’s Cabinet choice.

Hagel cleared the threshold when 30-year veteran Republican Sen. Richard Shelby said he would vote for the fellow Republican and former senator after joining other party members last week in an unprecedented delaying maneuver of the Pentagon nominee. Republicans have been critical of Hagel, charging he is not sufficiently pro-Israel and tough on Iran.

“He’s probably as good as we’re going to get,” Shelby told an Alabama newspaper.

In another boost for Hagel’s nomination, former Republican leader Bob Dole, a decorated World War II veteran, issued a statement Thursday saying, “Hagel’s wisdom and courage make him uniquely qualified to be secretary of defense and lead the men and women of our armed forces. Chuck Hagel will be an exceptional leader at an important time.”

If confirmed, Hagel, a twice-wounded Vietnam combat veteran, would succeed Defense Secretary Leon Panetta, who is stepping down after four years first as CIA director and then Pentagon chief.

Although a Republican, Hagel has faced strong Republican opposition, with many of his former colleagues voting last week to stall the nomination. They have questioned his support for Israel, his tolerance of Iran and willingness to cut the nuclear arsenal. His opposition to the Iraq war after his initial vote for the conflict angered his onetime friend, Sen. John McCain, a Republican.

Hagel once said “the Jewish lobby (in the United States) intimidates a lot of people here” and does some “dumb things” that aren’t “smart for Israel.” He also said that “I’m not an Israeli senator. I’m a United States senator.” Those statements and others caused jitters in Israel, where in some circles he is seen as unsympathetic.

Regarding Iran, Hagel in the past has questioned the efficacy of unilateral sanctions, arguing that penalties in conjunction with international partners made more sense. However, in his responses during confirmation hearings, Hagel adopted a hard line on Iran, echoing Obama’s position that the U.S. would consider all options, including military action, to keep Iran from acquiring a nuclear weapon.

Shelby’s support was a clear sign of weakening Republican opposition, and it prompted two letters within hours from Hagel’s fiercest Republican foes. One letter went to the president calling on him to withdraw the nomination, the other to Republican senators pleading with them to stand together against Hagel.

Fifteen Republicans senators wrote that Hagel lacks the bipartisan support and confidence to serve in the vital job of defense secretary.

“The occupant of this critical office should be someone whose candidacy is neither controversial nor divisive,” wrote the senators — all opponents of Hagel. Leading the effort was Texas Sen. John Cornyn, the party’s No. 2, who is up for re-election next year.

One name missing from the letter was McCain, who has called Hagel unqualified but indicated last Sunday that he wouldn’t stand in the way of a Senate vote.

Separately, the top Republican on the Armed Services Committee, Sen. Jim Inhofe, sent a letter to his Republican colleagues urging them to vote again to block the nomination when the Senate returns from its recess next week. He acknowledged the reality that if the Republicans fail to block a vote, Hagel proponents have the votes to approve him on a yes or no vote.

“Make no mistake: A vote for cloture (ending the debate) is a vote to confirm Sen. Hagel as secretary of defense,” wrote Inhofe. He said that while the Senate traditionally defers to presidents on their Cabinet choices, “our nation is at war. The Senate must insist on confirming only the most effective leaders.”

At the White House, spokesman Jay Carney rejected Republican calls for Hagel to withdraw. He complained that Republicans were putting politics ahead of national security, pointing out that the administration wants Hagel to be part of decisions on the size of the U.S. force in Afghanistan as American and coalition forces wind down combat operations.

“This waste of time is not just meaningless political posturing because we firmly believe that Sen. Hagel will be confirmed. The waste of time is of consequence,” Carney told reporters.

The Senate also is holding up the nomination of John Brennan to be CIA director, with Republicans and Democrats seeking more information about the U.S. policy on the use of drones. Hagel and Brennan would join Secretary of State John Kerry in Obama’s overhauled, second-term national security team.

Hagel is expected to get all 55 Democratic votes and the support of three Republicans — Sens. Thad Cochran, Mike Johanns and Shelby. Two other Republicans — Sens. Susan Collins and Lisa Murkowski — voted last week to allow the nomination to move ahead and are expected to do the same next week, giving Hagel the requisite 60 votes out of 100 necessary to end a parliamentary delaying tactics.

A yes or no vote on confirmation, with only a majority of 51 necessary, could occur as early as Wednesday.

The delaying maneuver left the administration angry and troubled by the prospect of a nomination in limbo, with opposition groups redoubling their efforts to scuttle Hagel and the uncertainty of a weeklong Senate break. But the administration is more confident about Hagel’s prospects after private conversations with several senators to ensure Hagel gets past the 60-vote barrier, according to an official close to the confirmation process. The official spoke on condition of anonymity because he was not authorized to discuss private conversations.

Hagel’s nomination also has become entangled in Republican demands for more information from the Obama administration about the deadly assault on the U.S. diplomatic mission in Benghazi, Libya, last September that killed Ambassador Chris Stevens and three other Americans.

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Associated Press writers Donna Cassata and Darlene Superville contributed to this report.

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Copyright 2013 The Associated Press.