Barack Obama campaigned at Los Angeles Trade Technical College in East Los Angeles. (Photo: Damon Winter/The New York Times)

LOS ANGELES – A $32 million month.

That’s how much Senator Barack Obama has raised so far in January, according to his campaign manager, David Plouffe, who announced the first fund-raising tally of 2008. The campaign attracted 170,000 new contributors during the month, he said.

“Obviously this contest could go on for some time in the primary,’’ Mr. Plouffe said, speaking to reporters on a conference call earlier this morning. “We think the strength of our financial position and the number of donors does speak to financial sustainability.”

“If this ends up going through March and April, we think we’re going to have the resources necessary to conduct vigorous campaigns in every state to come.”

In 2008, presidential campaigns are required to report their fund-raising totals every month. The official filing with the Federal Election Commission will come in February, but the Obama campaign was eager to preview their $32 million figure today.

Since Mr. Obama began his presidential bid a year ago, the campaign has signed up 650,000 contributors, many of whom are contributing far below the $2,300 maximum limit and are able to donate again and again.

Mr. Plouffe noted that many of the contributors also play another role: campaign volunteers in the 22 states holding contests on Feb. 5 and in the string of states to follow.

“Their financial support is obviously very, very important, but just as important is the volunteer support that they give us in these states,” Mr. Plouffe said. “We think we do have a decided advantage over Senator Clinton in terms of the amount of voter contact that we’re doing.”

The campaign is spending record sums of money, too.

In addition to the advertisements already airing in the Super Tuesday states, Mr. Plouffe announced that commercials will begin airing tomorrow in Louisiana, Washington state and Nebraska, the next round of contests on Feb. 9, as well as Virginia, Maryland and the District of Columbia, where voters weigh in on Feb. 12.