Potential 2020 Democratic presidential contender Sen. Elizabeth Warren and her husband more than doubled their average charitable donations in 2017, one year before the Democrat was set to run again for her Senate seat in Massachusetts.

Warren and her husband Bruce Mann released their tax returns in August, which reveal an average charitable donation of about 4 percent from 2008 to 2017. In that last year, however, one year before her re-election bid, Warren and her husband donated nearly 9 percent of their income to charity, the equivalent of about $82,000.