There's no "sedition" in 1st amendment expression.
The Sedition Act (officially An Act for the Punishment of Certain Crimes against the United States; ch. 74, 1 Stat. 596) made it a crime to publish "false, scandalous, and malicious writing" against the government or its officials.
If that law you cite has never been enforced, and if it is now suddenly being used in a selective, political manner, I hope some Constitutional lawyers get in on the case and challenge it through the courts.