President Donald Trump has taken aim at MSNBC host Nicolle Wallace in a bizarre social media rant. The drama started when 79-year-old Trump kicked off his Sunday morning with a cryptic post on Truth Social. “Bela,” he wrote, leaving his followers to debate the meaning of the word.

Special U.S. envoy Steve Witkoff said Sunday that Russian leader Vladimir Putin agreed at his summit with U.S. President Donald Trump to allow the U.S. and European allies to offer Ukraine a security guarantee resembling NATO’s collective defense mandate as part of an eventual deal to end the 3 1/2-year war.

President Trump, Ukrainian President Volodymyr Zelenskyy and other European leaders came together at the White House Monday to work out a possible way to end Russia's war in Ukraine. CBS News White House reporter Taurean Small has more.