As a member of the 112th Congress, Allen sits on the Small Business and Armed Services Committee. He has introduced seven major pieces of legislation, and was the original sponsor of H.R. 1246 which reduces costs at the Department of Defense. Almost unheard of for a freshman member, this bill passed the House of Representatives unanimously on a vote of 393-0 and was subsequently signed into law by President Barack Obama as part of the National Defense Authorization Act.

In Congress, Allen is a staunch advocate for a strong US-Israeli alliance.