Is the state of the economy because of a Republican controlled Congress?

The Republicans say that the financial melt down of 2008 wasn't because of there was a republican president ( with veto power) in the white house or because there was a republican controlled senate...They say it was because of a Dem controlled Congress...Now we have a Democrat president and Dem controlled Senate. The congress is controlled by the Republicans...According to their own logic, aren't the Republicans now responsible for the economy?....