"The U.S. should do all in its power to avoid misunderstandings that could escalate to a great conflict," the lawmakers said.
President Donald Trump has accused Democrats of putting the U.S. military at risk.
China's foreign ministry said Beijing acts in full compliance with U.N. sanctions.
North Korea's participation in February's Winter Olympics is a recent development.
Similar actions have provoked a sharp response from North Korea in the past.
The president expressed doubts about the benefits of diplomacy.
Ted Cruz called for President Donald Trump to put Kim Jong Un "on his heels."
Mark Weber, director of the California-based Institute for Historical Review, received a letter from Britain’s Home Office telling him he is no longer allowed.
"If you have the largest system of concentration camps in the world...you probably shouldn’t go to the Olympics," Graham said.
Six sailors are being charged.
Moranbong, which has roughly 20 female members, was personally founded by North Korean leader Kim Jong Un in 2012.
The decision sparked heated debate: Will it bolster the U.S. military's ability to deter threats, or make a nuclear war more likely?
An East Asia scholar suggested in a tongue-in-cheek editorial that Trump should consider targeting the North Korean leader's porcelain throne as a way of scaring the crap out of the dictator.
Trump recently boasted his "nuclear button" is much larger than Kim Jong Un's.
The U.S. Army is struggling to find physically fit recruits.
North Korea conducted its sixth nuclear test in early September.
A new poll said 86.4 percent of U.S. voters believe the U.S. military should only be used as a last resort.
A Chinese general facing corruption charges committed suicide in November.
The tweet was from actress Mindy Kaling.
He works 12 hours a day—even as an octogenarian, reports said.