Trump unapologetically bashed protesters at one of his rallies in Radford after he was interrupted during a speech about illegal immigration and Mexico. "Are you from Mexico?" Trump shouted from the stage.
Rubio and Cruz argue that with roughly 70% of GOP voters consistently voting for someone other than Trump, they have an opening as the GOP field keeps shrinking.
English19/01/2016
Sarah Palin endorses Donald Trump
"No more pussy-footing around," Palin said, adding that Trump would allow the military do its job.
About one in 10 Americans who plan to cast a vote this election will do so for the first time in years, if ever, and Trump holds a decided edge with them, according to polling by Reuters/Ipsos.
Trump's position has also forced vulnerable Republicans facing re-election next year into an awkward position.
Seven in 10 Republican and Republican-leaning registered voters say Trump could win in November 2016 if he is nominated.
Even as she enjoys a surge in momentum after last week's Republican debate, Fiorina is facing more jibes about her tenure at HP.
Demonstrator Efrain García was outside a press conference on the Trump's new pledge of loyalty to the Republican Party.
Asked if he would support Trump as Republican nominee over Clinton in the November 2016 contest, Bush said, "I would, of course."
The Republican presidential hopeful said he would secure the boarder through more guards, fencing and air patrols.