If I may interject.....
The OP concerned whether or not President Obama and/or the Democratic Congress was bowing to a special interest when introducing legislation that would terminate the DC voucher program.
Although not directly addressed in the OP, addressing that question would inevitably lead to a question whether vouchers, in general or in DC specifically, were a good idea. After all, the President might be opposed to vouchers based on principled opposition, fueled by careful analysis of the situation, as opposed to just being in the pocket of a particular special interest group.
Among the things not relevant is whether or not he's a socialist, or the messiah, or a good President in general. And unless the Secretary of State starts pressuring the Swedes to end their school voucher program, there is no need to even mention the name of any President who served prior to 2001.
Back to our regularly scheduled topic....
I want to reexpress an argument that is at the core of my pro-voucher support.
I fully agree with the quote provided by TB:
some guy name Coleman back in the '60s said:
a student's family's income and the collective social and economic background of his classmates are by far the most important influences on his academic future.
If that is the case, no modification in the methods, pay, or even number of teachers in inner city schools will result in any significant modification of academic performance.
In order to improve academic performance, it is necessary to allow low income students to attend school with high income students.
In the public school system, the vast majority of students are required to attend school near their homes.
In order to avoid going to school with low income students, families of middle and high income students move to neighborhoods that are segregated by income. (In the US, that also frequently means segregated by race, but I think income is the more important concern today for most people.) The public school system thus perpetuates and reinforces income segregation of our cities.
To improve this situation, students must be allowed to attend schools that are distant from their homes. Although inconvenient, many parents will find this a preferable alternative to relocating to a more affluent neighborhood.
The most effective way to achieve that goal, of allowing students to attend schools that are distant from their homes, is a voucher program that is not geographically limited, although other methods may also achieve the same result.
Now that's just a sketch, but that's the basic reason I advocate voucher programs. Note that it is not based on some belief in free market magic, nor is it based on criticism of current teachers and/or their collective bargaining representatives. In that sense, it does not follow the typical line of arguments for school vouchers. I am curious to hear what response there is to this line of argument from voucher opponents.