Sen. Ron Johnson criticized a "false hit piece" about his attendance at hearings.
The letter is the latest sign of concern from lawmakers.
The group wants three presidential candidates to support "universal contraceptive coverage."
The majority whip had told The Hill he would attend after missing 2015's ceremonies.
"I fear this culture of destructive behavior will only continue," Carson said of Cruz's campaign.
Lt. Gen. John "Mick" Nicholson was confirmed by unanimous consent.
"An attack against this homeland is coming," Sen. Lindsey Graham said.
Cristina Marcos 02/04/16 05:33 PM EST
Rep. Wenstrup has an idea for motivating Congress to finish its appropriations process on time...
Reid says, using GOP logic, Colin Powell should be criminally charged.
Julian Hattem 02/04/16 04:05 PM EST
The lawmakers claim to want to observe Iran's Feb. 26 elections.