Rep. John Larson (D-Conn.) said Tuesday that a "complex partial seizure" was what caused him to seize up during a House floor speech the previous day. Why it matters: The 76-year-old's office had initially said the incident — which quickly went viral on social media — was likely caused by an "adverse reaction to a new medication.

Rep. John Larson (D-Conn.) froze up and had difficulty speaking during a House floor speech on Monday, in what his office said was likely an “adverse reaction” to a new medication. The 76-year-old lawmaker was highlighting concerns about Social Security after the Trump administration accessed sensitive Treasury Department payment data.

Connecticut Rep. John Larson froze during a speech on the House floor Monday in what his office is calling an “adverse reaction” to a medication. Larson, 76, had been criticizing how Elon Musk and his subordinates in the Department of Government Efficiency (DOGE) were able to obtain access to sensitive payment information in the U.