Despite a barrage of negative ads against him from Democrats and Republicans alike, U.S. Sen. Cory Gardner’s approval rating did not budge in the last three months of 2019, according to polling released Thursday by Morning Consult.

The research firm and news outlet, which surveys senatorial and gubernatorial approval ratings each quarter, found 37% of Coloradans approved of Gardner in the fourth quarter of 2019 and 40% disapproved of the Yuma Republican, who faces re-election this November. The remainder were undecided.

“There’s still a pocket of voters out there — a very measurable amount of voters — that are not familiar enough, perhaps, with Cory Gardner to have an opinion of whether he’s doing a good job or not,” said David Flaherty, a Republican pollster. “That’s both a plus for Cory, but also a good observation for those Democratic organizations looking to oust him.”

In the third quarter of 2019, Gardner’s approval rating was also -3 — 36% approved and 39% disapproved then — suggesting the three-month span from October to New Year’s, a span that included House impeachment of President Donald Trump and a long list of attack ads against Gardner, did little to affect Coloradans’ opinion of their senator.

Morning Consult’s survey found the president remains unpopular in Colorado, with 39% of those surveyed saying they approve of Trump and 57 percent disapproving.

While Gardner remains slightly unpopular in the state, according to the poll, his supporters will find solace in two findings: that negative ads didn’t immediately harm his approval rating, and that Gardner’s approval rating is much higher than Trump’s. Democrats have worked hard to tie the senator to the president and will continue to do so.

Morning Consult’s data comes five days before the Senate impeachment trial begins. Gardner has been quiet on the Senate’s trial procedures but critical of the House’s impeachment last month. Flaherty said a post-trial poll will be far more insightful than Thursday’s pre-trial poll results.

Colorado’s other senator, Democratic presidential candidate Michael Bennet, fared better than Gardner in the fourth quarter, with 39% of Coloradans approving and 32% disapproving. Gov. Jared Polis also had a positive approval rating, with 46% of those surveyed approving of his job performance and 34% disapproving.