WASHINGTON, D.C. (WRN) — A ‘credible threat’ forces a Wisconsin congressman to miss votes and reschedule a town hall.

According to a statement from Representative Derrick Van Orden’s office, the threat against the 3rd Congressional District Republican’s family was made via a letter delivered to his Washington D.C. office. Van Orden’s office says the threat involved his wife, children and grandchildren.

Because of the threat, Van Orden won’t attend votes on Capitol Hill and is rescheduling an upcoming town hall.

Democratic Representative Mark Pocan, who represents Wisconsin’s 2nd Congressional District, condemned the threat against Van Orden, saying no elected official should receive death threats.