Dominion Voting Systems on Friday brought a $1.3 billion defamation suit against the conservative lawyer Sidney Powell, alleging that her false and outlandish claims about fraud in the 2020 election “caused unprecedented harm.” The suit is the first salvo in what is expected to be a flurry of high-priced litigation against prominent conspiracy theorists and right wing media organizations that have spread baseless falsehoods about President Donald Trump’s defeat in November’s election. It comes as the nation continues to reckon with the aftermath of Wednesday’s deadly insurrection in Washington in which a mob of Trump supporters stormed the U.S. Capitol.