This is definitely weird, but not newsworthy. Maybe there's more to this story, but from the article quoted by the OP I fail to understand how this is news. He's of clear enough mind to apologize on national television- it seems like a tiny bit of an overreaction to be clamoring for his resignation, as some of the sources in the article are.
I'm more concerned by this quote:
the congressman... became the first Chinese-American to serve in the House when he was elected in 1998.
Is that really true? How totally depressing.