Former Vice President Joe Biden campaigned in Iowa with former U.S. Secretary of State John Kerry.
According to Reuters, Kerry is the most significant endorsement for Biden so far.
Biden hopes his experience in global affairs will give him an advantage against Democratic rivals.
The Democratic candidate argues he’s in the best position to repair traditional U.S. alliances that Trump hurt.
Kerry said: “We need a president who has shown he can immediately heal a broken world.”