Different times. And just because Lincoln proved that he was up to the challenges doesn't mean Obama is.
Regards, Ivan
If Obama wants to be like Lincoln, he should be more conservative, since Lincoln was a Republican.
Instead of comparing himself to someone who was President about 145 years ago, he should remember how well recent democrat presidential candidates have been. The last five democrat presidential nominess who had ever been U.S. senators are John Kerry, Al Gore, Walter Mondale, George McGovern, and Hubert Humphrey, and all five of them lost. If the Democrats nominate Sen. Obama, Sen. Clinton, Sen. Biden, or Sen. Dodd, the Republican will probably win.