The previous post had a set of resources on nuclear weapons issues. Historically, nuclear weapons issues have blurred lines between the political left and the political right in the U.S.. Recently, however, there have been sharper divides, and the organizations listed in the previous post tend towards the views of the current political left, which is more aligned with a disarmament agenda.
If you are seeking conservative perspectives, the best resources are often the conservative ‘think tanks.’ For example, the Heritage Foundation and the Cato Institute.
Also, seek writing from publications like the National Review and the American Conservative. Often it helps to search on a specific issue, e.g. the Iran Nuclear Deal or nuclear weapons modernization.
Finally, you can get some material that takes a more conservative point of view from our current government, e.g. on this page on the Nuclear Posture Review.