WASHINGTON—Colin Powell worries that President Barack Obama is trying to tackle too many big issues at one time and he offers this advice: take a hard look at costs and consider the additional red tape that will be created.

“The right answer is, ‘Give me a government that works,”’ the former secretary of state said in a television interview to be aired Sunday. “Keep it as small as possible,” added Powell, who said he has spoken recently with Obama and stays in touch with him. Powell, a Republican, endorsed Obama last year over the GOP presidential nominee, Arizona Sen. John McCain.

Obama wants to overhaul the health care system and take on climate change while also helping the country emerge from the recession.

“I think one of the cautions that has to be given to the president—and I’ve talked to some of his people about this—is that you can’t have so many things on the table that you can’t absorb it all. And we can’t pay for it all,” Powell said.

“And I never would have believed that we would have budgets that are running into the multi-trillions of dollars, and we are amassing a huge, huge national debt that, if we don’t pay for in our lifetime, our kids and grandkids and great grandchildren will have to pay for it.”