Joe Biden:
1991: Favors government "back doors" into encryption. 
Refugee policy is an embarrassment.

Cory Booker:
Supports military spending on Foreign Affairs Committee. 
Transgender troops should be allowed to serve. 

Pete Buttigieg:
Be serious about security like Israel, but live freely. 
There's a consensus on immigration if we have the will. 
Supports DACA and easing deportation policies. 

Julian Castro:
Supported military expansion into cybersecurity.

John Delaney:
Voted for 25 out of 28 military spending bills. 

Tulsi Gabbard:
Don't cut military budget; fund weapons systems & ABMs. 
Allow transgender Americans in the military.

Kamala Harris:
Domestic terrorism as national security priority. 

Amy Klobuchar​:
Voted for 95% of military spending bills in Congress. 

Beto O`Rourke:
Supported 11th aircraft carrier; opposed 1% military cut. 
Military should welcome transgender recruits. 

Andrew Yang:
Too much military spending focuses in decades-old threats. 

Source: OnTheIssues.org