Atlanta Mayor Keisha Lance Bottoms announced Thursday she will not seek a second term, an election-year surprise that marks a sharp turnabout for the city’s second Black woman executive who months ago was among those President Joe Biden considered for his running mate.

Democratic presidential candidates roared back into Iowa on Saturday touting fresh endorsements, critiquing their rivals and predicting victories in the caucuses that will soon launch the process of deciding who will challenge President Donald Trump. Sen. Elizabeth Warren said she was “delighted” to pick up a coveted endorsement from The Des Moines Register. The state’s largest newspaper called the...