0 in the US, a politician or voter who supports the Democratic party but is on the conservative side of the party:
In the wake of Bush's victory, he and other members of his conservative "Blue Dog" faction had to deny persistent rumours about switching parties.
She certainly wasn't enough of a "blue dog" to hold up the health care bill.
Blue Dogs typically oppose any measure that swells the deficit.
President Obama privately huddled with undecideds from the centrist Blue Dog caucus.
