He won Nevada in his 2008 and 2012 campaigns, and Democrat Hillary Clinton carried the state by 2 percentage points over Trump in 2016.
"The Democrats don't care about what their extremist immigration agenda will do to your communities, to your hospitals - what about your hospitals and to your schools", Trump said.
Former Vice President Joe Biden says American values are "being shredded by a president who is all about himself".
They have seized on comments by lawmakers like Rep. Maxine Waters, who in June had urged supporters during a rally to "create a crowd" and "push back" whenever they happened to spot a Trump administration official in public.
He said that his administration is "going to figure it out" and that he's "already figured it out", but didn't elaborate on what the administration is doing to stop the caravan from entering the U.S., instead telling the crowd that he would keep it "low-key" until after the election.
Trump was in rural Elko, Nevada, for a rally a short time after Biden appeared hundreds of mile south in Las Vegas.
The YouTube clip was shot by a man who reports say is the leader of the Miami chapter of the Proud Boys, according to the right-wing blog Big League Politics.
The round of criticisms offered an early preview of a potential Biden-Trump matchup as the former vice president is mulling a presidential bid in 2020. I hope he's going to be the nominee actually. Dean Heller and the race is seen as one of Democrats' best chances to flip a seat this November.
"Call me", he told the Democratic leaders in Congress, Sen.
"Folks, it's time to get up! Remember who the hell we are", Biden said.
In a further sign of the state's importance in the midterms, former President Barack Obama scheduled a stop Monday in Las Vegas.
Biden plans on being one of the most active Democratic surrogates on the midterm campaign trail in the final stretch before November 6.
Video of the confrontation shows the small group of hecklers shouting obscenities and calling Pelosi (D-Calif) a communist in English and Spanish as she walks into a Wednesday campaign event for congressional hopeful Donna Shalala in Coral Gables. However, as The Washington Post reported, the protest occurred outside Florida Democratic House candidate Donna Shalala's headquarters.
The President's Nevada stop comes fewer than 24 hours after his Arizona rally, where he also spoke at length about Democrats and immigration. "It's embarrassing. But it's also unsafe", Biden said.