The former president has also appeared in radio ads for Jeb Bush.
Bush said Trump's plan to ban Muslims from coming to the U.S. is not serious.
He spoke to the Republican Jewish Coalition, which cheered the candidate's mention of his brother.
Bush's staff was “incredibly upbeat and pleased" with his performance, a source said.
Jeb Bush leads in financial sector money, as donors were angry with Obama's policies.
Donors are struggling to understand what happened to the candidate in Wednesday's debate.
Despite cuts and low poll numbers, some donors say they still believe in Bush's candidacy.
Presidential candidate Jeb Bush’s fundraising has declined from what some were calling “shock and...
Clinton had been heckled the night before over taking campaign donations from private prisons.
The Democratic front-runner said people of color need "real solutions," not lectures.
Donald Trump continued his dominance online.
The former Florida governor also released a seven-point plan on veterans.
"Everybody else is in the witness protection program. Everybody else is running for cover."
A gay couple bought two other Web domains with Jeb Bush's name.
Said Cain, "Jeb Bush has been doing nothing but losing throughout this entire campaign."
"We actually are doing high-fives right now," tweeted Brian Fallon, Clinton's press secretary.
Some supporters whether Bush should take that tone against his former protégé.
Jeb called George W. Bush's response "the case study of leadership."
An internal memo attributes need to cut costs to unexpected rise of Donald Trump.
On paper, Jeb Bush’s 2016 campaign mirrors Mitt Romney’s 2012 efforts.
While former Florida Gov. Jeb Bush leads in lawmaker endorsements, Rubio has pushed ahead in the...
Ray Sullivan could help Bush land some of Perry's former donors.
Kimmel spoofed Trump’s vague policy positions on Thursday with a parody ad.
Nationally, Trump is almost 10 points ahead.