Wilted Faster than a Head of Lettuce, they did.

 Thinking ahead is not the strong suit of either Establishment party in our country, it appears: 

BREAKING: Liberal Democrats withdraw letter to Biden urging him to rethink Ukraine policy amid political fallout

Perhaps they have been better briefed on what is coming, and the need for unity in these perilous political times. Perhaps they didn't realize how many voters would respond to the original message. (?)

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*paraphrasing:  The Only Way to Win is not to Play the Game  ~WarGames (circa the 80s. nothing new under the sun. Keep this drama to the movies. Safer for the planet that way. Wars are deadly, not like lawn maintenance, remember.)