U.S. Sen. Mark Warner, D-Va., speaks at a news conference as he and other senators unveil legislation that would allow the Biden administration to "ban or prohibit" foreign technology products such as the Chinese-owned video app TikTok, in Washington, D.C., March 7, 2023. WASHINGTON — The chairman of the Senate Select Committee on Intelligence warned Wednesday that artificial intelligence could be manipulated to affect the 2024 U.S. elections and financial markets. These are "the two areas where AI can have the most immediate disruptive effect," Sen. Mark Warner, D-Va., told CNBC's "Squawk Box." "With a presidential year coming … the…