How do I single space blog entries?

I have to say this help forum is really annoying. Most posts don't really answer people's questions.

However, I have nowhere else to go.

I am a poet, and I post my poetry to a blog with Live Writer. The last two poems display double spaced, and thus the stanzas are lost. The poems make less sense now. Nothing I do removes the extra spaces where I don't want them.

Please advise how I can remove double spacing. I used the "Paste Special" tab to post without formatting, but it makes no difference.

The blog is hosted by Wordpress.

Thank you.