WASHINGTON — Osama bin Laden is dead. What is less clear is whether al-Qaida is just as dead.

Mixed with praise for President Barack Obama for his bold action in approving the raid Sunday to kill bin Laden in Pakistan, Democrats, Republicans and military analysts warned that the terrorist organization bin Laden founded nearly two decades ago remains a threat to the United States and other nations in Western Europe.

“It remains to be seen whether al Qaida will come up with another leader of the magnetism that bin Laden had,’’ said Peter Mansoor, a professor of military history at Ohio State University who as an army colonel served as Gen. David Petraeus’ executive officer in Iraq. “If it does, it will continue. If not, it will splinter into a lot of operations.’’

Ohio Attorney General Mike DeWine, who as a member of the U.S. Senate had served on the Senate Intelligence Committee, said, “there is no one I am aware of who has ever thought that killing bin Laden would totally end the war on terror. It’s important for symbolism and it’s important for morale, but there are a lot of terrorists out there.”

Sen. Rob Portman, R-Ohio, agreed, saying that “while this is a milestone that we have all awaited, we must remember that al-Qaida and its affiliates are not dependent on one man and we must remain vigilant’’ in efforts to thwart future terrorist attacks.

Emerging Monday in the aftermath of the attack was what appeared to be a new sense of unity among some lawmakers in Washington.

House Speaker John Boehner, R-West Chester Twp., said at a news conference on Capitol Hill that just as 9/11 served as a reminder that “we’re all Americans,” the events Sunday night “united our country in much the same way.’’

Obama personally telephoned Boehner at 10 p.m. Sunday to tell him about the attack. “Good job,” Boehner told the president.

DeWine, in particular, hailed Obama for his determination to strike bin Laden in Pakistan, ostensibly an American ally in the war on terror.

Acknowledging that Pakistan was reluctant to allow U.S. ground forces to operate in its country, DeWine said “we had no choice but to do that.’’

Rep. Mike Turner, R-Centerville, who along with his daughter was among hundreds of people who celebrated outside the White House on Sunday as Obama addressed the nation, said Monday on CNBC that “the location he (bin Laden) was at is going to be a treasure trove of additional intelligence.”

Mansoor described the Navy Seal team that attacked bin Laden’s compound as an organization that does “many of the high-end counterterrorism missions.

Along with the Army’s Delta Force, they’re extremely well-trained. This was clearly a kill-or-capture mission, and they killed him.”

He also said “it makes sense’’ that the U.S. buried bin Laden at sea. “You don’t want the grave to become a shrine for Islamic militants or vandalized by people who hate Osama bin Laden,’’ Mansoor said. “It’s the same reason Hitler doesn’t have a grave.’’