On this day in 1948 President Truman signs the Foreign Assistance Act, which history remembers as the Marshall Plan. On to today's top stories:

"Obama Trims Clinton's Lead in Pa." (Devlin Barret and Beth Fouhy, Associated Press) In a surprising turn, things are looking up for Barack Obama in Pennsylvania. He's scored some big endorsements and has come from behind in the polls. The problem for Hillary Clinton is that she doesn't just need to win; she needs to win big.

"Against McCain, Clinton Bests Obama in Swing-State Polls" (David Lightman, McClatchy Newspapers) Now for the flip-side: In three important battleground states -- Florida, Ohio and Pennsylvania -- Clinton beats McCain in head-to-head matchups, while McCain beats Obama. This is part of why Clinton says Obama can't win in November.

"McCain and Clinton Ads Spar Over How to Solve Home Mortgage Crisis" (Michael Cooper, New York Times) It's 3 am, and apparently bad things only happen at 3 am. Clinton released the latest 3 am ad hitting McCain on the economy, and within hours, the McCain shop hit back.

"DNC Convention Stance Surprises Campaigns" (David Paul Kuhn, The Politico) Part of the compromise the DNC has agreed to is to seat Michigan and Florida delegates on three standing committees at the convention. One of these committees is that Credentials Committee, which decides which delegates get seated on the floor.

"John McCain Zeros In On the Economy" (Jill Zuckman, Chicago Tribune) Pummeled by Obama and Clinton for saying he doesn't have much economic experience, McCain is brushing up and hitting back.

"Indiana Marks the Next Test for Clinton" (Amy Chozick, Wall Street Journal) Like Ohio and Pennsylvania, Indiana should be sound Clinton country -- lots of working-class voters known as the Reagan Democrats. But right now the state is a toss-up, due to Indiana's nearness to the Chicago market and Obama's native-son appeal.

"McCain Camp Working Out Healthcare Details" (Michael Kranish, Boston Globe) The Democrats have been debating healthcare for almost a year now, while the GOP focused on other issues. But with the economy threatening to become the dominant debate in the fall, McCain is looking at how to make up for lost time.

"In Speeches, Clinton Often Veers to Dark Side" (Anne Kornblut, Washington Post) No, it's not the "anger, fear, aggression" Yoda warns of; it's the anecdotal tales Clinton uses to color her speeches on matters like healthcare and the economy. The underlying characteristic of each anecdote, however, is almost always pain and sadness.

"Democrats' Campaign in Puerto Rico Becomes Entangled in Statehood Issue" (Sarah Wheaton, New York Times) One of the consequences of the primary lasting through every state is that the candidates have to address local issues in every state. And in Puerto Rico that includes statehood.

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