Sidney Powell, President Donald Trump’s former lawyer, filed an eye-popping brief this week that could potentially doom her chances of dismissing a $1.3 billion defamation suit and provide ammunition in a separate lawsuit seeking her disbarment.Sidney Powell, President Donald Trump’s former lawyer, filed an eye-popping brief this week that could potentially doom her chances of dismissing a $1.3 billion defamation suit and provide ammunition in a separate lawsuit seeking her disbarment.