TikTok users in the US are opening the app to find a message saying they can't use the social media platform for now due to a law enacted in Washington.

TikTok has gone dark across the US - affecting 170 million American users - after the Supreme Court ruled against its bid to avoid a ban that has shut the app down.

NBC's Kristen Welker spoke exclusively with President-Elect Trump ahead of his inauguration about his plans for his first days in office.

Trump inauguration moved inside by freezing weather as large crowds gather in Washington for protests: Live - President-elect ...