到底是一'棄暗投明'(勝人一籌)之舉, 還是一'晚節不保'(低人幾等)之下策?

http://en.wikipedia.org/wiki/Arlen_Specter

起初就是民主黨人

A Democrat in his youth, Specter joined the Republicans in 1966;

http://www.chicagotribune.com/news/la-na-specter29-2009apr29,0,4439026.story

Some Democrats skeptical of Specter's party switch

http://www.chicagotribune.com/news/la-na-specter-assess29-2009apr29,0,2038572.story

since dems and reps are carrying different kinds of heads, aren't they?

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就象 楊振寧先生的 '新婚' -- 難說了, 不是嗎?