Sen. Marco Rubio, R-Fla., could effectively challenge Democrats' advantage among Latinos -- and with it Hillary Clinton's hopes to move into the White House -- the former Montana Gov. Brian Schweitzer told CNN on Sunday.

"Democrats win on demographics," Schweitzer warned on the news channel's "State of the Union," according to the Washington Examiner. "And part of that demographic is Latinos."

Few of the almost two dozen Republican hopefuls in the 2016 White House race would be as attractive to the Latino electorate as the son of Cuban immigrants and junior senator from Florida, the Democrat contended.

"A guy like Marco Rubio, who is a new generation, a younger guy, a guy who is Latino, speaks Spanish fluently -- he would create problems for some parts of the Democratic Party," he said.

"Does he get through the primary? I don't know. But he's the new generation of Republicans, as opposed to the old generation," the former governor admitted.

Clinton, meanwhile, seems to recognize the threat posed by the 44-year-old senator and has aggressively attacked Rubio in recent campaign events. Last week, in the midst of Donald Trump's headline-grabbing showoff with Fox News host Megyn Kelly, the former secretary of state told a New Hampshire crowd that the Floridian was as dangerous for women as the real estate tycoon, MSNBC noted.

"Yes, I know [Trump] makes great TV; I think the guy went way overboard -- 'offensive,' 'outrageous,' pick your adjective," Clinton said.

"But what Marco Rubio said has as much of an impact in terms of where the Republican Party is today as anybody else on that stage," she added in reference to the first debate of GOP presidential hopefuls, during which the senator had highlighted his opposition to abortion except in cases of rape or incest.

Despite the attention he is getting from Clinton, Rubio continues to trail a number of his GOP challengers - including Trump and former Florida Gov. Jeb Bush -- in the latest primary polling, the Washington Examiner cautioned.