A new poll shows the race for the open Senate seat in Nevada is tied between Republican Rep. Joe Heck and Democratic former state Attorney General Catherine Cortez Masto.

The YouGov/CBS News poll showed both candidates pulling 39 percent of likely voters while 18 percent remained undecided. Heck had a 3-point edge in the same survey in August.

A RealClearPolitics average of recent polls gives Cortez Masto a slight 0.3-point advantage. 

After recently recanting his endorsement of GOP presidential nominee Donald Trump, Heck came under fire from his own party, poll analysis shows. 

The YouGov/CBS poll found that 53 percent of Nevada Republicans believe party leaders oppose Trump because they are afraid of losing votes. Of those polled, 73 percent want GOP leaders to back their presidential nominee. 

The Rothenberg & Gonzales Political Report/Roll Call rates the race a Tossup.

In the presidential race, Democratic nominee Hillary Clinton was up 46 percent to 40 percent over Trump in the Silver State. Clinton had a 2-point lead in August. 

The poll found that 70 percent of likely Hispanic voters supported Clinton compared to 26 percent for Trump. Among African-American voters, Clinton was up 91 percent to 4 percent. Trump does, however, have a 12-point lead among white voters, 48 percent to 36 percent.  

The poll surveyed 996 likely Nevada voters from Oct. 12-14. The margin of error was 4.5 percentage points.