Do you dread tax-filing day? Well on this day in 1913 the 16th Amendment, essentially legalizing a federal income tax, is ratified. On to today's top stories:

"Nader, Spoiling For a Fight, Says He'll Run Yet Again" (Leslie Hoffecker, Los Angeles Times) Let's get through this up top: Ralph Nader has run for president twice -- once as a factor and once as a non-factor. The question is whether Nader's fortunes are cyclical or whether they're on a steep slope of rapidly diminishing returns. He'll have his supporters, but his candidacy isn't the third-party run that will dramatically change this race.

"Clinton Tests Out Populist Approach" (Perry Bacon Jr. and Alec MacGillis, Washington Post) Hillary Rodham ... Edwards? Reporters Bacon and MacGillis make the comparison between the original populist and the New York senator, writing Clinton "increasingly sounds like one of her old Democratic rivals." Having lost them to Obama in Wisconsin, Hillary is on a crusade to win back white, working-class voters to save her candidacy.

"Obama: Hillary Taking False Credit" (Christina Bellantoni, Washington Times) Meanwhile, Barack Obama was in Ohio, where he still trails Clinton, criticizing what he calls Hillary's "co-president" theme: "Every good thing that happened [in the Clinton administration] she says she was a part of, and so the notion that you can selectively pick what you take credit for and then run away from what isn't politically convenient, that doesn't make sense."

"McCain Is Accused of Financing Breach" (T.W. Farnam and Brody Mullins, Wall Street Journal) DNC Chairman Howard Dean plans on filing a complaint with the Federal Election Commission asking them to investigate John McCain's request to withdraw from the federal matching-funds program. Back in the dark days of last year, McCain entered the program to keep his stumbling candidacy alive, but now that his financial fortunes have turned, McCain is trying to get out.

"Costly Campaign Vows Face Reality Check" (Andrew Taylor, Associated Press) In last week's debate, Obama talked about the "silly season in politics." It's surely upon us, just not in the way Obama meant. All the campaigns are making promises to voters based on monetary hand-outs that the federal government just can't afford. But what's that got to do with winning an election?

"GOP Fears Charges of Racism, Sexism" (David Paul Kuhn, The Politico) Ever since it became obvious that the GOP would face either a black man or a white woman in the general election, the party hass known that the Democrats will happily defend their candidate through identity politics.

"McCain Wins 20 GOP Delegates" (David McFadden, Associated Press) McCain swept all 38 delegates up for grabs this weekend, including 20 from Puerto Rico. McCain has said he will help resolve the complicated relationship between Puerto Rico and the federal government.

"Distrust of McCain Lingers Over '05 Deal on Judges" (Carl Hulse, New York Times) Three years ago, John McCain took yet another swipe at conservatives by joining the so-called Gang of 14, whose power over judicial appointments stemmed from its strength in numbers. Some nominees whom conservatives felt deserved approval were sacked for the sake of bipartisanship. The flip side to this is that McCain showed that he could work across the aisle in difficult, highly-partisan conditions.

"At Governors' Meeting, a Vice Presidential Buzz" (Robert Pear, New York Times) The National Governors Association's meeting in Washington brought to town many possible VP choices for GOP and Dem alike. Although the denials were loud, the auditioning was also fierce.

Get today's other election stories at RCP's Politics and Election page.