evidence: Joe Biden's presidency is social media official. On Wednesday, Twitter transferred the White House accounts to the new presidential administration. That's important because politicians and government officials use these accounts to reach millions of Americans with the click of a button. "Institutional White House Twitter accounts have now been transitioned from the Trump administration to the Biden administration," Twitter said in a statement Wednesday. [...] The new @WhiteHouse account currently has 2.5 million followers. The White House account used by the Trump administration, which is now archived as @WhiteHouse45, had 26 million followers.