An office at the State Department that serves as the nerve center for tackling overseas disinformation is likely to close amid Republican pushback.

The recent hack of U.S. telecommunications systems is one of the most serious cyberattacks in the nation’s history and is an ongoing open national security threat, lawmakers are warning.

Both the House and Senate come back into session this week after more than a month of recess, and multiple cyber and tech-related issues are high on the to-do list for the returning members.

Vice President Kamala Harris, President Joe Biden’s pick to succeed him as the Democratic nominee for president, has a history of endorsing cybersecurity and tech measures.