Rep. Ed Markey (D-Mass.) said Sunday that Japan's nuclear crisis is raising doubts about nuclear power here in America.

"It is calling into question of the viability of nuclear power in this country," Markey said on CBS's "Face The Nation."

Markey said the United States needs to reassess its use of nuclear power and has called for a moratorium on the construction of nuclear power plants in earthquake-prone areas in the wake of Japan's massive earthquake and tsunami more than a week ago. That quake has led to worries over a nuclear meltdown at the damaged Fukushima nuclear plant.

"We should be humble in the face of Mother Nature," Markey said, adding that we should "act cautiously."

A longtime critic of nuclear power, Markey said the nuclear crisis in Japan should make it harder for the Congress to pass loan guarantees for new nuclear plants. Without that government support, the industry is likely to stall, according to the lawmaker.  

"It's pretty clear that the nuclear industry as an electrical generating part of our mix for the future is now going to meet its maker in the marketplace. It won't be protesters, it will be Wall Street investors raising questions about its viability going forward," Markey said.