China has reportedly issued stark warnings to the Biden administration over a planned trip by House Speaker Nancy Pelosi to Taiwan. China has publicly threatened to take “strong measures” if Pelosi makes the trip in August, but according to the Financial Times, China is privately warning the Biden administration that it may respond militarily. Pelosi’s trip has also faced opposition from within the Biden administration. National security adviser Jake Sullivan reportedly opposes the trip out of a concern it could escalate tension in the region. If the trip goes ahead, Pelosi would become the most senior U.S. official to visit Taiwan in 25 years.