"I don't know anything about that," says Donald J. Trump,

[MineralMan]

whenever he's trying to back away from some failed plan. Now, he "doesn't know anything about Indiana," because that trick didn't work.

Feh!

[3catwoman3]

1. His go to line, which is true about pretty much anything.

The only times he is fully enthusiastic about a topic are when he is bragging about himself or whining about how badly he is treated.

[Ocelot II]

2. He always does that.

If something was a success he claims credit for it even if he had little or nothing to do with it. If it was a failure he didn't know anything about it even if it was all his idea and he was up to his fat orange ass in it.

[Rebl2]

3. I believe

him when he says he doesn’t know anything about anything because he’s not running the country. His goons are.

[tulipsandroses]

4. For someone who claims to have a big brain and knows more than everybody else about everything

He sure says "I don't know anything about that" quite a bit.

[chowder66]

5. It's become a go-to line for most republicans on the hill.

They use it when they don't have a canned lie to respond with.

[dalton99a]

6. "I didn't do nuthin'"