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But that adds another contentious issue to an already full agenda, and is likely to further alienate parts of his political base who are wary of expanded free trade, particularly with the U.S. economy already so sluggish.

On Afghanistan, Mr. Obama laid out a vision for what the people of that country deserve, including basics like electricity and being able to get goods to market.

Speaking earlier in the day on ABC’s “This Week,” CIA Director Leon E. Panetta said the U.S. has the right strategy, though he acknowledged “some serious problems” with the country.

“It’s harder, it’s slower than I think anyone anticipated. But at the same time, we are seeing increasing violence,” Mr. Panetta said.

He said the Taliban is “engaged in greater violence” now than when Mr. Obama took office, and said they are stronger now in some ways, but weaker in other ways - including having some of their leadership killed or captured.

He also said that only between 50 and 100 members of al Qaeda remain in Afghanistan.

At his press conference in Toronto, Mr. Obama said that doesn’t mean the mission is accomplished and said the U.S. still has an interest in making sure Afghanistan doesn’t deteriorate back to a pre-Sept. 11 situation.

Some Democrats in Congress have urged the president to withdraw troops now, while others worry that his stated timetable of beginning to withdraw troops in July 2011 will slip. Top Republicans, meanwhile, argue that a withdrawal date is unwise.

Mr. Obama acknowledged that debate, but said his focus is on making sure his current strategy is successful.

But last week’s leadership change - he relieved Gen. Stanley A. McChrystal of command in Afghanistan and tapped Gen. David H. Petraeus to replace him - has left top lawmakers wondering whether the civilian leadership also needs reshuffling.

Speaking on the Sunday talk shows, Senate intelligence committee Chairwoman Dianne Feinstein, California Democrat, and Sen. Lindsey Graham, South Carolina Republican and member of the Senate Armed Services Committee, said this is likely Mr. Obama’s last chance to get the strategy in Afghanistan correct and that he must give Gen. Petraeus the latitude he needs.

“You put the general in; he should make the call. If he can’t work with the ambassador, the ambassador should be changed,” Mrs. Feinstein said on “Fox News Sunday.”

Gen. McChrystal and his staff had been critical of the civilian leadership, including Ambassador Karl W. Eikenberry and Richard C. Holbrooke, the State Department’s envoy to the region, who seem to have strained relationships with Afghan President Hamid Karzai.

“I think we put all our eggs in the Petraeus basket at this point,” Mrs. Feinstein said.

Other Democratic senators, though, said Mr. Obama has expressed confidence in the team he has now, including Mr. Holbrooke and Mr. Eikenberry.