The three top presidential candidates raised more than $70 million for their campaigns in April, proving that donors are still giving generously to their favorite candidates despite a long primary season that's now winding down.

According to officials on Republican John McCain's campaign, he raised $18 million in the month of April -- his best fundraising month yet -- for a total of $22 million on hand and about $1 million in debts.

Clinton collected $22 million for the month. Her campaign chairman Terry McAuliffe told FOX News Tuesday that April would be her second best fundraising month on record.

Clinton reported $19.5 million in debts, including $10 million she has lent her campaign. Even without the loan, Clinton was in negative cash position. The loan amount also did not include an extra $1.4 million she put into her campaign in May

Meanwhile, Barack Obama, still embroiled in the primary contest with fellow Democrat Hillary Clinton, continued to raise the bar in campaigning financing -- pulling in $31.3 million, plus $600,000 for the general election.

That gives him $37 million on hand to complete the primary cycle, plus another $9 million for the general election, according to his campaign. Officials also pointed out he has had 1.4 million donors and 2.9 million donations.

This brings Obama's overall fundraising total to $265 million for his White House bid.

Also releasing their reports were the Republican National Committee and Democratic National Committee, which raised $15.7 million and $4.7 million in April respectively. Overall, the RNC has raised more than $52 million, compared to $22 million for the DNC.

DNC sources say they hope to accelerate the fundraising once their fractious primary comes to a close. Then comes the task in which the Democratic winner's team will have to reach out to the loser's donor base for general election contributions.

Meanwhile, McCain plans to accept public financing for the general election - a sum of about $85 million -- while helping the RNC raise money through their joint Victory Fund Committee. If nominated, Obama is expected to decline the public funding.

The Associated Press contributed to this report