Story highlights Ben Carson tweeted that his campaign has raised $3.5 million this week

Carson's past has been the subject of recent media scrutiny

Washington (CNN) Ben Carson said Saturday he's hauled in $3.5 million in campaign cash this week thanks to a "biased media."

The retired neurosurgeon and Republican presidential candidate claimed 10,000 donations each day of the week in a tweet.

"We the People have made 10,000 donations each day this week, raising $3.5M this week alone. Thank you biased media," he tweeted.

We the People have made 10,000 donations each day this week, raising $3.5M this week alone. Thank you biased media. — Dr. Ben Carson (@RealBenCarson) November 7, 2015

Saturday's fundraising figure -- and media tweak -- comes in the wake of reports about Carson's past.