Donald Trump’s surge in Colorado is fading as the newest poll shows Democrat Hillary Clinton with a solid advantage.

A Quinnipiac University survey released Monday gives Clinton an eight-point edge against the Republican nominee in a four-way race, 45 percent to 37 percent.

Libertarian Gary Johnson received 10 percent in the Oct. 10-16 poll, which has a margin of error of plus-or-minus 3.7 percentage points.

In a two-way race, the margin only grows: 51 percent for Clinton and 40 percent for Trump. The former secretary of state’s advantage is built with support from minorities, women and independent-minded voters.

The survey shows “some Colorado comfort for Hillary Clinton and Sen. Tim Kaine,” said Tim Malloy, the poll’s assistant director, and “for Donald Trump and Gov. Mike Pence, a cold shoulder and a mountain possibly too high to climb.”

The new numbers come a day before Trump prepares to visit Colorado for two campaign rallies on his way to the final presidential debate Wednesday in Las Vegas.

A Quinnipiac poll in mid-September showed the two candidates essentially tied in Colorado. A CNN poll put the race is a similar posture as Republicans sensed momentum in a state Democrats considered a sure bet for months. The most recent polls, however, give Clinton a solid lead.

In Colorado’s U.S. Senate race, Democrats continue to dominate. The new Quinnipiac poll gives Democratic incumbent Michael Bennet an overwhelming advantage against Republican challenger Darryl Glenn.

Bennet took 56 percent to 38 percent for Glenn, the survey found. Bennet’s advantage is built on a 30-point lead among voters who consider themselves independents.

The Democrat’s 18-point lead dovetails with polling since the start of the race, most of which has shown Bennet with a double-digit advantage against an underfunded Glenn.

The Quinnipiac poll took place in the days after the only televised Senate debate and mostly concluded before Glenn and a friendly super PAC went on the air with commercials attacking Bennet.