The super-PAC backing Hillary ClintonHillary Diane Rodham ClintonBiden faces do-or-die primary in South Carolina President Trump's assault on checks and balances: Five acts in four weeks Schiff blasts Trump for making 'false claims' about Russia intel: 'You've betrayed America. Again' MORE's presidential campaign is out with a new digital ad in Iowa emphasizing strengthening the economy and middle class as Clinton looks to make her closing arguments against Bernie Sanders ahead of Monday's caucuses. 
The Priorities USA spot, shared exclusively with The Hill, accuses Republican candidates of representing only "more help for the rich," while rounding up the some of the key planks of Clinton's campaign.
“Despite so many in the middle-class who are struggling, Republicans like Donald Trump, Ted Cruz and the rest of the GOP field would ignore families who are falling behind in order to give massive tax breaks to the super-wealthy," Justin Barasky, the communications director for Priorities USA, told The Hill in a statement.
"Hillary Clinton will fight them every step of the way and has a plan to rebuild the middle class by making college more affordable, providing paid family leave, and strengthening equal pay for equal work."
Barasky went on to criticize Republican "special interests" for trying to tip the primary scales against Clinton in the run-up to the caucuses. Three separate conservative groups have launched ads in the state that Clinton allies believe are meant to stymie her nomination
"GOP special interests are doing everything they can to prevent her from winning, but Iowans and the rest of the country won’t be fooled because they know Hillary Clinton is the only one strong enough to beat the Republicans in November," he added. 
The digital spot will run statewide as part of a six-figure buy the group announced last week. It lasts exactly 30 seconds, which could make it easier for the ad to transition onto the television airwaves in the future. 
Clinton's campaign also released two new ads on Wednesday, five days before the caucuses, that imply that Bernie Sanders's plans are too idealistic. She's effectively polling in a dead-heat with Sanders, despite leading the vast majority of the way through 2015.