Today in History: May 20, Lincoln signs Homestead Act

See the world in vertical: Top photos by AP photojournalists

Former political rivals head to rematch in Alabama governor’s race and runoffs for US Senate seat

Oregon voters reject Democrats’ gas tax increase as Iran war causes prices to soar

Trump’s grip on the GOP on display in Kentucky as primaries are held in six states, in photos

Georgia Republicans dig in for runoffs for Senate and governor as campaigns go into overtime