Many of the lawsuits center on the use of mail-in ballots, which are expected to be at all-time highs due to the pandemic.
During the 2018 election cycle, billionaires gave $611 million, up from $17 million in 2008.
The nonpartisan Tax Policy Center estimates income taxes would go up for all Americans, but mostly the wealthiest.
The former New York mayor has enjoyed a surge in polling numbers heading into tonight's Democratic debate.
The fourth Democratic debate on Tuesday revealed sharper edges than its predecessors.
Back then she was best known as a Harvard professor who studied bankruptcy.