Excellent post.
We should always mourn and remember the assassination of a US President. Despite the rancor in today's politics, the men (and, I expect, someday soon, women) who have led and lead our country, should be honored for their accomplishments and their desire and willingness to stand in harm's way to try to guide this nation in the way they feel is best. Whatever disagreements we may have with our Presidents, regarding policy, theory, priorities, and even their human flaws, we should always honor the simple fact that these people have willingly taken on a job with a 10% assassination rate, and most, if not all, of them have done so largely because they feel they can help make a great country better.