Virtually every state has laws forbidding texting while driving. However, iOS devices have the ability to send text messages through the Voice-activated Siri (Android devices may have similar capabilities). For instance, you can say the following:
Me: Hey Siri. Send a text to my wife.
Siri: What do you want to say?
Me: Traffic is bad, I'll be home a little late.
Siri: [Displays my message on screen] Ready to send it?
All of this can be done without touching the phone, and although a transcription of your message appears on the screen, it is not necessary to look at it.
From a legal point of view, would asking Siri to send a text while you are driving be considered texting and driving?