Amid escalating tensions with North Korea, U.S. participation in the 2018 Winter Olympics in South Korea remains an "open question," U.S. Ambassador to the United Nations Nikki Haley told Fox News. "I know that the goal is to do so but that'll be a decision made closer to the time", she said.
"I think those are conversations that we're going to have to have, but what have we always said? That's something he would take into account, probably a number of the stakeholders that would be involved".
The tweet came less than an hour after Sanders said at the White House daily press briefing that the US government - and President Donald Trump - had yet to decide whether to participate, appearing to raise doubts about the safety of visitors to South Korea, a key ally.
The International Olympic Committee and the White House did not immediately return CNN's request for further comment on who is responsible for deciding whether athletes will attend. This was a response to a joint military exercise between the US and South Korea involving many advanced warplanes.
The International Olympic Committee announced Tuesday that it was banning Russian Federation from competing in the winter games over a massive doping conspiracy.
"He plans to watch an ice hockey event together with his fans to relay his thanks and contribute to the success of PyeongChang", a Tree J representative said.
"The U.S. looks forward to participating in the Winter Olympics in South Korea", Sanders said Thursday on Twitter.
Tensions with the USA have ratcheted up after a series of North Korean missile tests.
She later added: "There's an open question".
Haley added that while she didn't know whether or not American athletes would participate in the games (which are scheduled to take place from February 9-25 in Pyeongchang) she said that the Trump administration would "find out the best way" to keep American athletes safe.
But her concerns and stated uncertainty had already bounced around the Olympic world as officials from the United States to Pyeongchang offered reassurances. "But what have we always said?"
"There is full support from the United Nations, very positive message coming out of the assembly", Dubi said.