US Senator Elizabeth Warren and other liberal lawmakers on Wednesday sent a letter to David Sacks, the head of AI and cryptocurrency at the White House, asking him to clarify whether he exceeded the 130-day annual work limit for special government employees. Sacks is currently a partner at the venture capital firm Craft Ventures, and his dual status has raised ethical controversy. Earlier, The New York Times reported that Sacks played a key role in the US-UAE AI chip deal, which is linked to the...