Trump and Pence are on the same page as the former vice president has also vowed to fight the subpoena.
Former Vice President Mike Pence is planning to fight a federal grand jury subpoena compelling him to testify in the investigation into President Donald J. Trump’s actions leading up to the riot at the Capitol on Jan. 6, 2021, according to a person familiar with Mr. Pence’s plans.
Mr. Pence is expected to argue that the vice president’s role as the president of the Senate means that he is protected from legal scrutiny of his official duties by the Constitution’s “speech or debate” clause, intended to protect the separation of powers.
Such an approach would be novel and a departure from the more traditional argument that a vice president’s interactions with a president would be subject to executive privilege.
https://conservativebrief.com/challenges-pence-71340/