[weegee]

(formatting helps keep the rhyme...)

Despite all Ter-Ay-Zuh’s wild gushing
About Edwards’ and Kerry’s hair-brushing,
In the cold light of day
All one needs to say
Is they’re just two full Johns that need flushing

The beat pattern I found online was:

da da DUM da da DUM da da DUM
da da DUM da da DUM da da DUM
da da DUM da da DUM
da da DUM da da DUM
da da DUM da da DUM da da DUM

Just to use your limerick as an example, here is the same rhyme with just a few minor changes:

Despite all Ter-Ay-Zuh’s wild gushing
About Kerry/Edwards’ hair-brushing,
In the cold light of day,
All that one needs to say,
Is they’re two full Johns that need flushing!

[Bernard Marx]

Sorry about formatting: I forgot.

I guess I need to toss that English degree of mine in the circular file -- it didn't even teach me limerick scansion! I'm not too bad at heroic couplets, sonnets and villanelles though.