Sen. Kamala Harris (D., Calif.) told a crowd in Nevada on Thursday that electing Rep. Jacky Rosen (D., Nev.) to the Senate next week would "benefit" California, fueling criticism that Rosen is taking too much money from out of state.

"The people of my state are going to benefit by what you are doing here to support her, " Harris told supporters gathered at a "Future Is Female" fundraiser event in Reno, Nevada. "Because of what you do to support Jacky Rosen."

Rosen, the Democratic nominee in Nevada's Senate race, is challenging incumbent Dean Heller, who is the only sitting Republican senator up for reelection this year in a state that Hillary Clinton won in 2016.

An analysis done by the Nevada Independent earlier this year found that Rosen took "substantially more money than either Heller or [Danny] Tarkanian from out-of-state campaign donors."

The same analysis found that only 11 percent of Rosen's itemized donations came from Nevada residents, while 52 percent of Heller's donations came from the state.

"Jacky Rosen sold out Nevadans to support Nancy Pelosi and Chuck Schumer's radical agenda, and win over their liberal donors," Michael McAdams, spokesman for the National Republican Senatorial Committee, said in February.

Heller's campaign spokesman echoed that sentiment following Harris' campaign stop in Reno.

"Jacky Rosen is bought and paid for by California liberals," Keith Schipper said. "Kamala Harris has made it perfectly clear: Congresswoman Rosen answers to them, not Nevadans."

Other out-of-state supporters who have recently campaigned for Rosen include former President Barack Obama and late-night host Jimmy Kimmel.