Trump has 28 percent support in the poll — Jeb Bush is in second with 14 percent.
His favorable rating has risen to 24 percent, up from 12 percent in March.
The Des Moines Register ran an editorial Tuesday calling on Trump to drop out of the 2016 race.
"We cannot let this become the new normal," he said of recent mass shootings.
The majority of the haul came from just two donors.
Rep. Eric Swalwell, a California Democrat, will support O'Malley for president.
Federal officials confirmed they have been asked to investigate her use of a private email...
She endorsed New York's state minimum wage increase but avoided a specific national number.
“In 2016 I’m ridin’ with Biden,” the supporters say in a new ad.
Kenyans are treating Obama’s trip as a homecoming.