If they jointly own the cellphone account, then he in part was facilitating an insurrection, yes.

If Ginni's cellphone account is separate from his, then only she should be subpoenaed. If she fights it and it goes to SCOTUS but he doesn't recuse himself, he should be impeached.

— @Cy_Guy Save Democracy! 🇺🇸 Biden/Harris 2024 (@CyGuyDC) March 25, 2022