They warned those in attendance that bad candidates and a lack of energy compared to Democratic voters could result in a large number of losses for Republicans come the November midterm elections.
The former president used his first public speech in a while to warn of what he called a serious problem within the Republican Party.
"This election, you aren't just voting for a candidate. You're voting for which party controls Congress. A very important thing. Very important thing," Trump said.
"...the GOP looks like the America of 1950. The motto of the Republican Party should be: diversify or die," said Brad Bannon, a Democratic political analyst.
The ads are depicting Democratic candidates as "dangerous and outside the mainstream."
The Bernie Sanders-backed progressive pitched himself as an outsider who must fight decades of "muscle memory" around what a governor nominee is supposed to look like.
We live in a culture that is increasingly accommodating of those who want to suppress unpopular opinions.
In Florida, it's Trump vs. "the swamp," and the outcome could determine the future of the Republican Party.
Democrats took to Sunday morning news programs to tell viewers they had no plans of impeaching President Trump.
Republican strategists are hoping that the killing of Mollie Tibbetts will distract from the Manafort-Cohen chaos.
"The longer a scandal-plagued Hillary Clinton lingers in American politics, the worse off House Democrats will be," a National Republican Congressional Committee spokesman said.
The irony is that married women with children could be the primary drivers for either party.
Russian attacks on our democracy are a clear threat aimed at the heart of America, but Trump is more concerned with his wall.
Two polls out Wednesday indicated a tight race between incumbent Senator Ted Cruz and Democratic challenger Beto O'Rourke.
Tom Steyer plans to spend at least $110 million in 2018 to support Democrats in the midterm elections.
Operatives are installing malware that could give them remote control of parts of the country's power network.
Trump provided no evidence for his claim.
"The Democrats have a death wish, in more ways than one," Trump wrote on Twitter early Thursday morning.
The results of the poll came from 48 Republican-held districts across the country.
Arizona, Florida and Ohio each went for President Trump in 2016.
Virginia Republicans voted to nominate a senatorial candidate with deep connections to white supremacists and anti-Muslim coalitions Tuesday evening. Corey Stewart, a former gubernatorial candidate, confederate statue defender, and praiser of anti-Semites, clinched the nomination.
Seth Grossman, a "Make America Great Again" candidate who clinched a surprise win last week in South New Jersey's Republican congressional primary, is coming under national scrutiny for saying that "the whole idea of diversity is a bunch of crap and un-American."