Days ahead of Indiana’s May 3 primary, a new poll shows Democratic presidential rivals Bernie Sanders and Hillary Clinton neck and neck while observers foresee the Vermont senator’s impact being felt long after the nomination is secured.

According to the NBC News/Wall Street Journal/Marist poll, Clinton leads among likely Indiana primary goers 50 percent to Sanders’ 46 percent. But that lead is within the poll’s margin of error of 4.6 percentage points for Democrats.

The poll also shows Sanders with a greater edge over Clinton in a hypothetical general-election match-up against Donald Trump. If voters in Indiana were making that choice now, the Republican front-runner came away with a seven-point lead over Clinton, but just a single point lead over Sanders.

Also on Sunday, the Sanders campaign announced that it had brought in $25.8 million in April, with the average donation being just under $26. And while the amount is far less than the $44 million haul in March, or $43.5 million in February, the campaign still touted it as surpassing the average monthly total of $17 million.

“He is the candidate who is in the best position to bring a new generation of voters into the democratic process and restore the faith of working-class voters that we can have a government that works for all of us, not just the 1 percent,” Sanders’ campaign manager Jeff Weaver said in a statement.

Speaking to CBS‘s “Face the Nation” on Sunday morning, Sanders said his path to the nomination is “difficult but not impossible.”

Clinton, for her part, told CNN‘s State of the Union Sunday, “I’m very far ahead in both the popular vote and the delegate count, so I think the path leads to the nomination,” adding, “I certainly look forward to working with Senator Sanders in the lead-up to the convention, in the lead-up to [writing] the platform.”

Many in the media have already declared it over for Sanders since his loss to Clinton in New York, though Sanders has since stressed to his supporters, “We’re going all the way to California,” referring to that state’s presidential primary on June 7. 

Gary Legum writes at Salon Sunday:

Still, argues Cenk Uygur, host of “The Young Turks,” Sanders getting the nomination is improbable but not impossible. Uygur adds in his piece at CNBC, “the revolution is coming.”