OK, first things first - the marquee tag is deprecated so there's no guarantee that it will work as expected in future (though it's likely to for backwards compatibility reasons). Is there any other way that you might present this info - an RSS feed perhaps?
By default the marquee takes 100% of the width of the container so in your CSS for the tag put something like:
#myMarquee{
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By default the marquee takes 100% of the width of the container so in your CSS for the tag put something like:
#myMarquee{