With tensions still rising with North Korea, Col. Tony Shaffer (Ret.) said the military option should not be disregarded.
"The military option is viable. It may be necessary," said the retired colonel, who is known for his claims about the mismanaging of intelligence information prior to the September 11th attacks.
"You cannot continue the same process we had before and expect the North Koreans to abide," Shaffer told "Fox & Friends" on Wednesday.
The United Nations Security Council voted unanimously on Tuesday to slap new sanctions on the rogue nation, which has tested the patience of the international community with its nuclear weapons program.
President Trump described the additional sanctions as "not a big deal," and said he doesn't know whether they will have any impact.
"Those sanctions are nothing compared to what ultimately will have to happen," Trump said on Wednesday.
Shaffer said that although the president wants to avoid using force, he is "smarter than the average bear" and recognizes it is time to "go after the enablers," such as powerful North Korean ally China.