Bingo.
There are three ideas that sum up the Tea Party movement over all.
1. We are taxed too much
2. Our tax money is spent unwisely
3. Our lawmakers do not listen to us
Michelle Bachmann voted against spending this money (1. We are taxed too much), but when the money was spent, she wanted it spent wisely (2. Our tax money is spent unwisely). When asked about it, she responded with an honest answer and didn't try to deny that she sent the requests in (3. Our lawmakers do not listen to us).
Good summary
What is the definition of spending tax money wisely? And why does a $150 million expansion of a commuter rail line in her district qualify?