Ultimately, yes. As the elected leader of the US, the President is responsible for the economy as part of domestic policy. Remember also the words on the sign on President Harry Truman's desk, "The buck stops here." (pun intended--but no less true.)
He introduced the New Deal
The new deal
he wanted to help the American because he knows that the Americans economy it's not doing well
He ran a fundraiser and gave the benefits to the government
President Nixon did try to help the economy. Nixon imposed wage-price controls which were not successful. Nixon also attempted to gain better management of government financial programs.
As president, Kennedy urged Congress to pass laws to help the millions of americans living in poverty.
Barack Obama seems to be one example.
The gold standard
Every president has wanted to help the economy. The idea that the government should try to control the economy is fairly recent , mostly since Roosevelt in 1932 and after Roosevelt there is some disagreement about what kind of government intervention will actually help the economy, but certainly every president since FDR has thought about what the government can do to help the economy, and even before Roosevelt , presidents tried to take steps to make the economy better.
President Hubert Hoover expected the Reconstruction Finance Corporation to energize the economy and help the Stock Market poll out of its downturn. The Corporation was a huge disappointment.
The new deal :)
President Obama is coming up with a new stimulus package to help with unemployment. The Government is constantly coming up with new plans to help the economy.