The real reason Democrats have embraced a progressive agenda has not been to energize their own base but to lure Reflex voters from the other side."Reflex" voters = people who vote regularly (as opposed to "unreliable" voters, who only vote in presidential elections).
Obama and his party’s candidates talk about the minimum wage in the hope that working-class whites skeptical of Democrats on other matters will become more ambivalent about voting Republican. Democrats’ renewed interest in women’s issues—including a defense of Planned Parenthood and embrace of equal-pay standards—is also designed with defections in mind. In 2012, the Obama campaign’s entire direct-mail program on women’s issues was targeted at reliable voters who leaned Republican: Field experiments in the first half of that year had showed that the messages were most persuasive among voters whose likelihood of voting for Obama previously sat between 20 and 40 percent.