IMO

Significado de saltar por las picas de Flandes :
1.- Atropellar por cualesquiera respetos o inconvenientes.
http://www.significadode.org/pica.htm

[PDF] Resilient Individuals Use Positive Emotions to Bounce Back From ...
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There are individuals who seem to “bounce back” from negative .... is reasonable to predict that this ability to bounce back would be ...
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:)

I think this fits in the context. Right-wing media equate health care reform to the Kansas-Nebraska Act ... Seemingly, they can only try to outdo themselves and continue to ramp up .... Limbaugh on oil drilling: Politicians "falling prey to ... myth that ...
mediamatters.org/research/201003250039 - En caché; the last policy initiative they manage to outdo themselves again and again in ..... This is what the right wing tories have been planning for thirteen years, ...
www.guardian.co.uk/politics/.../welfare-unemployment-benefi... - ; this is the year for republicans to out do themselves nominating the ...
voices.washingtonpost.com/44/2010/.../sharron-angle-cancels-debate-i.html; We're talking about the almost screaming right wing bias of this paper, .... But they outdo themselves as muckrakers by going on to say that Jordan and the .... "JK, a client, a friend, and one of the keenest minds in American politics, ...
www.americanpolitics.com/030498NYTandJordan.html - En caché - Similares

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Note added at 12 hrs (2010-12-22 10:43:50 GMT)
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Right-wing politicians outdo themselves or the right outdoes itself...

I've been turning over a number of expressions in my mind. The RAE dictionary definition is "Atropellar por cualesquiera respetos o inconvenientes". It has a bit of riding roughshod, a bit of the bull in a china shop, a bit of taking the fight to the opposition, a bit of brooking no opposition, but I can't quite make anything else fit. It really means pressing on in a provocative, arrogant and aggressive manner regardless of objections.

Here is a use which captures the sense the writer is getting at, over a bullfight in Cataluña, where the issue is highly charged politically, with anti-bullfighting feeling wrapped up with Catalan nationalism:
"Al otro lado de la barrera policial, entre las 18.000 personas que asistieron a la corrida, estaban los nacionalistas españoles, a quienes el toro también les importa un pimiento. Para ellos, celebrar una corrida en Barcelona es como saltar por las picas de Flandes, una ocasión para restregar por los hocicos de los “separatistas catalanes”, que Cataluña también es España".
http://kindsein.com/es/22/8/508/

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Note added at 55 mins (2010-12-21 22:46:19 GMT)
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I admit the alliteration may be getting out of hand here: "ploughs ahead provocatively politicising and prioritising..."...

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Note added at 59 mins (2010-12-21 22:50:22 GMT)
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There are variants, like "ploughs ahead arrogantly" or "ploughs ahead regardless". Or of course something else entirely...

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Note added at 13 hrs (2010-12-22 11:45:26 GMT)
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On a different tack, perhaps "with all guns blazing" offers a solution? The origin of the expression is the war in Flanders: taking the fight to the enemy, forcing your way through their defences.

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Note added at 1 day10 hrs (2010-12-23 07:54:17 GMT)
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Like maybe "forges ahead with all guns blazing"?