Coons said Biden deserves the "time and the space" to make a decision on whether to run.
Trump sought to mend fences with the prominent Hispanic business leader.
AFL-CIO chief Richard Trumka said there was still time for Biden to enter.
The 2016 presidential contender is walking back talk of a northern border wall.
Bush's campaign has released a video on the “liberal things that Trump believes.”
Mario Trujillo 09/01/15 11:03 AM EDT
Steve Wozniak gave a boost to Bernie Sanders's presidential campaign on Tuesday.
"Stay tuned, on September 16, I may be changing tactics," Christie told Jimmy Fallon.
Christie and Paul are now in the bottom half of the GOP field.
With public support for legalization on the rise, White House hopefuls are steering clear.
Jonathan Easley 08/31/15 07:37 PM EDT
The real estate mogul solidified his lead and dominated the race in August.