The fault lies not in the stars, but in ourselves.
Analyst John W. Palmer offers this infoporn big chart which compares and contrasts politics and the economy (click on image to make it much bigger):
( © John W. Palmer 2010; .pdf version here is much clearer )
It shows you pretty much what you should expect: In times of Republican rule, the economy suffers (Note: The proof is in the time lag -- when a Rethug President takes office, the unemployment numbers go up, and other economic indicators go haywire, about two years after they take office).
Don't like what the numbers say? Awwwwwwwwww. Tough. Don't vote for people who play Slash 'n Burn with life because they're too stupid and greedy to do much else.