TAG donk bets twice

[GMMigge]

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What happened to the button on the flop?

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The button was all in.

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Then I would simply call down. He's not folding anything, so raising for a free showdown or anything looks too fancy. Either he got you beat badly or he has a very good draw.

Only if a very scary A or K of hearts fell on the river would I consider folding if he continues betting.