Paul Ryan propelled Mitt Romney to a four-point lead over President Obama in Michigan, according to a polling firm that showed Romney trailing by one before he announced his running mate.

Romney leads Obama, 47-43, in this poll. “Our poll finding suggests that the naming of Paul Ryan as his running mate has given him the spark he needed,” said the polling firm, Foster McCollum White Baydoun, which conducted the survey on behalf of the local news outlet, My Fox Detroit. “The positive turn for Mitt Romney is also helping former Congressman Pete Hoekstra. Hoekstra has erased a 9.68 point deficit just before his primary victory in August and now has a 2.35 point lead over 2 term Senator Debbie Stabenow (48.28% Hoekstra to 45.93% for Stabenow).”

Thirty-six percent of the 1733 “registered and most likely voters” surveyed said that Ryan increased the likelihood that they would support Romney, compared to just 27 percent who said he weakened Romney’s chances of getting their vote. Another 36 percent of respondents said the Ryan choice had no effect on their vote.

Ryan budget plan enjoys narrower support in the state, as 48 percent support it but 45 percent oppose it. “The data prompts further study by the Obama team, Democratic Party and related supporters into the declining support for the President in what was a safe state for him,” Tarek Baydoun, statistical analyst for Foster McCollum White Baydoun, said in a statement on the poll. “In a state with a significant senior citizen voting population, the overall support for Congressman Ryan’s budget plan must be very troubling for the President and his team.”