Sen. Jon Tester calls on Biden to drop 2024 presidential bid AxiosVulnerable Dem Tester calls on Biden to drop out after giving Schumer heads up Fox NewsBehind the Curtain: Top Dems now believe Biden will exit AxiosSenator Jon Tester, Facing Tough Re-Election Fight, Urges Biden to Drop Out The New York TimesTop Democrats Prepare for Campaign Without Biden The Wall Street Journal