The vice president is expected to make his decision this month on whether to run for president.
Trump mocked Clinton aide Huma Abedin over her marriage to a "sleazeball."
“A lot of our guys are taking the bait,” Graham said.
Trump said late Tuesday it's unlikely he will attack Carson on the campaign trail.
Support for Clinton's campaign has been hurt by the server controversy.
The attack comes in a social media ad campaign, according to TIME magazine.
Nearly three-fourths of Donald Trump's supporters favor deportation.
“A lot of people want to see him on the debate stage in October," Josh Alcorn said.
Trump said he is in good company as a former Democrat.
He joins Ben Carson and Rick Santorum as the only GOP presidential candidates in favor.