Why is President Obama skipping the traditional Memorial Day visit to Arlington National Cemetery?

You'd think with the criticism he's been getting lately — the meme is he's disengaged and doesn't care — that he would do the standard things Presidents do to show that he is caring and engaged. Here, you have a traditional ceremonial presence in a unique place on a specific day, and he leaves it to Biden.

Also, with "don't ask, don't tell" ending — or perhaps ending — Obama has an additional reason to make a showing of his dedication to veterans.

What is he thinking?