Rather than wasting time on ad hominum attacks, lets look at the data..
Social Security Disability rolls have been increasing steadily for years, but the rate of increase actually went down a bit last year. The highest annual percentage increases shown (the linked data only goes back to 1997) in the number of people actually being paid were in 2003 and 2004. The largest increases in applications, on the other hand, were 2001 (11.21%) and 2009 (10.16%), both of which marked the beginning of recessions. What I find interesting is the small but consistent increase in the percentage of recipients taken off of the rolls in the past three years compared to the previous six.
This seems to have a lot more to do with the state of the economy, which is reasonable, than it does with who happens to be president at the time or which party he comes from.