Hillary Clinton has opened up a 14-point lead on Donald Trump in Colorado, according to a Wall Street Journal/NBC News/Marist poll released Friday.

Clinton is ahead of Trump 46 percent to 32 percent, which is a six-point gain since the end of the Democratic National Convention two weeks ago, the poll indicates.

In other findings in polling of battleground states, Democratic incumbent Michael Bennet of Denver maintained 15 percentage point lead over Republican Darryl Glenn in the race for U.S. Senate. Bennet held the same 53 percent to 38 percent margin he had a month earlier.

The Wall Street Journal points out that polling was done Aug. 4-10, when Trump was arguing with the Muslim-American family of an Army captain killed in Iraq over the family’s condemnation of Trump during the DNC. That dispute has settled down.

He also was in the news for fights with fellow Republicans, including his reluctance to endorse House Speaker Paul Ryan in his Wisconsin re-election bid, Sen. John McCain in Arizona and Sen. Kelly Ayotte in New Hampshire. Trump later endorsed all three, citing party unity.

“Colorado is an important state for the Trump-Pence campaign, and we will have all the staffing and resources we need to win in November,” said Patrick Davis, Colorado’s state director for the Trump campaign. “Colorado voters we hear from are tired of the same old Washington corruption and back room deals and recognize that Hillary Clinton represents what no one wants — a third Obama term.”

In Colorado, Trump has feuded with the Colorado Republican Party, calling the state’s caucus system rigged after it delivered no delegates for him to the Republican National Convention. The Colorado delegation walked out of the RNC in protest of Trump’s nomination on July 18.

The findings in Colorado reflect troubling polls for Trump in other swing states, as well as states such as Utah, where a Democrat has not carried the state since Lyndon Johnson in 1964.

Pollsters surveyed 899 registered voters in Colorado. The margin of error is plus or minus 3.3 percentage points.