An additional layer of scrutiny is being applied to the Clinton campaign precisely because it has been so transparent, the Democratic candidate's campaign manager maintained Sunday.

Robby Mook's comments came in response to CNN's Dana Bash asking him about the Clinton Foundation. Bill Clinton promised this week that the foundation would stop accepting foreign and corporate donations if Hillary Clinton is elected president in November.

News that the foundation plans to turn down certain donations depending on the outcome of the election follows reports that the organization may have had pay-to-play scheme in place when Hillary Clinton served at the State Department.

But why wait? asked CNN's Dana Bash. If there are concerns about conflicts of interest, why not stop accepting questionable donations immediately?

"There's all this scrutiny because Hillary Clinton has been transparent," Mook replied Sunday.

The Democratic candidate has not held a press conference in more than 256 days.

"I don't think you heard these questions when members of the Bush family continued to serve on boards for the first President Bush's foundation," Mook added. "So as I said, the foundation is taking unprecedented steps here, we're very proud that they're doing that. But right now we're focused on making sure Hillary Clinton becomes president."

Concerns that the foundation poses a serious conflict of interest to the Clintons have been shared by actors on both sides of the aisle, including by the Boston Globe's editorial board, which said the organization should be shuttered entirely if the Democratic nominee wins this fall.

The same newspaper also reported this week that even with the pledge to halt foreign and corporate donations to the foundation, much of the Clintons' network of charitable foundations would be exempt from this policy.

The Clinton Health Access Initiative, which raised 60 percent of its revenues in 2015 from foreign government grants, has no plans to stop accepting funds from overseas, according to the report.

This group "accounted for 66 percent of spending by the Clinton network of charities" in 2014, the Globe reported.

The Health Access Initiative also saw a massive uptick in foreign donations when Clinton served as secretary of state. The group not only failed to report those increases to the State Department, but it also failed to report all new foreign donations, the Globe noted.