Hillary Clinton appears to still be benefitting from a post-convention bounce, as a new McClatchy-Marist poll released Thursday showed her leading Donald Trump by 15 points nationwide among registered voters.

Not only did Clinton’s numbers go up, but Trump’s went down: she widened her lead to 48-33 this month from 42-39 in last month’s iteration of the poll.

While those numbers may be due to a convention bounce for Clinton, they also come in the midst of a rough week for Trump, in which he earned bipartisan criticism by feuding with the parents of a fallen Muslim-American soldier. McClatchy noted that the Marist poll showed the widest lead for Clinton of any survey so far.

Clinton kept her lead even with four candidates in the race, polling at 45 percent to Trump’s 31 percent, Libertarian Gary Johnson’s 10 percent and the Green Party’s Jill Stein at 6 percent.

The poll also showed Clinton netting some symbolic wins, with over half of those responding—53 percent—saying they would find her an acceptable president, compared to 39 percent saying they thought Trump an acceptable commander-in-chief.

Her support with Democrats was up to 90 percent from 83 percent last month, while 79 percent of Republicans said they would support Trump, down from 85 percent in last month’s poll.

Clinton also chipped away at Trump’s lead in every racial and ethnic group polled. Trump’s lead among white voters fell to 41 percent to Clinton’s 39, while Clinton led Trump 93-2 among black voters and 55-26 among Latino voters.

Another interesting data point was why respondents said they supported Trump’: 57 percent called their backing Trump an “anti-Clinton” decision, while 36 percent said they were voting for Trump because of man himself.

The McClatchy-Marist poll was conducted via telephone among 983 registered voters voters from August 1-3. The margin of error was 3.1 percentage points.