“How were her comments boasting?”
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What she did IS certainly worthy of boasting, but that is not how Sarah Palin rolls.
Boasting is more the domain of talentless, unaccomplished Commies who propagandize for the Democrat shill site Politico.
I’m thinking the writer wanted to be at the WHCD and got the Palin dinner duty instead, so was ticked off. He wanted to play with the “Big Boys” in his trade, do a little networking.
I recall her getting grief in ‘09 for bypassing that pro-life dinner, or something similar when she was in DC. There’s really no winning. But she absolutely did the right thing.