Both presidential and congressional campaigns are pushing for online donations today ahead of the midnight first-quarter fundraising deadline.

Barack ObamaBarack ObamaGinsburg: Trump Supreme Court nominee Neil Gorsuch is 'very easy to get along with' Ivanka, Kushner pushed to strike climate deal criticism from executive order: report Pence: Democrats' Obamacare promises were 'fake news' MORE's campaign is offering a dinner with Obama for four lucky donors who contribute this quarter. Hillary ClintonHillary Rodham ClintonDNI official challenges reports of low morale in intelligence community Why the GOP cannot sweep its Milo scandal under the rug Dems worry too much about upsetting others. That needs to stop. MORE sent out an e-mail urging supporters to give as few as $5 to help her reach a goal of $3 million for the final drive before the deadline.

Though Clinton has raised more than $2.5 million just from her latest online push, she's unlikely to raise more than Obama for the quarter. Obama in February and January had raised about $55 million , nearly $20 million more than Clinton had, according to campaign finance reports.

John McCainJohn McCainWhy the GOP cannot sweep its Milo scandal under the rug New York Knicks owner gave 0K to pro-Trump group Hannity apologizes for sharing 'inaccurate' story about McCain MORE has had the least fundraising success of the three remaining candidates, raising less than $11 million during the year's first two months. The Arizona Republican has yet to tap into big-money GOP donors that George W. Bush relied on during his two campaigns for the White House, the New York Times reported today.

In races for Senate, Democrats are seeking to buffet their campaign advantage with online contributions.

For instance, in Louisiana, where Sen. Mary LandrieuMary LandrieuFive unanswered questions after Trump's upset victory Pavlich: O’Keefe a true journalist Trump’s implosion could cost GOP in Louisiana Senate race MORE (D) could face a stiff test from Republican State Treasurer John Kennedy, Landrieu is hoping to raise $50,000 in a final online push. She has already raised $6.5 million for her reelection campaign, almost $4 million more than Kennedy has.