"Mitt Romney was a sitting duck for two months over the summer," Priebus said of the 2012 GOP presidential nominee.
To help his party ahead of the 2016 contest already in its earliest stages, Priebus said he would be hiring staffers to build the GOP among voters in the states.
"It will include hundreds of people - paid - across the country, from coast-to-coast, in Hispanic, African American, Asian communities, talking about our party, talking about our brand, talking about what we believe in, going to community events, going to swearing-in ceremonies, being a part of the community on an ongoing basis, paid for by the Republican National Committee, to make the case for our party and our candidates," Priebus said.
That move was among recommendations included in a months-long look at what went wrong in 2012. Priebus tapped a handful of respected party leaders to examine how the GOP could better talk with voters, raise money from donors, and learn from Democrats' tactics. Priebus also asked the group to examine how they could work with independent groups such as super political action committees.
Ari Fleischer, White House press secretary under former President George W. Bush, and Sally Bradshaw, a veteran strategist and top adviser to former Florida Gov. Jeb Bush, were among those leading the inquiry. Republican National Committeeman Henry Barbour, a GOP strategist and nephew of former Mississippi Gov. Haley Barbour, was also part of the group. RNC members Zori Fonalledas of Puerto Rico and Glenn McCall of South Carolina rounded out the committee that listened to Republicans' ideas.
Those leaders heard from 50,000 rank-and-file members about how to respond to the nation's shifting demographics.
Priebus planned a full-scale rollout of their recommendations Monday, although the proposals would have to win the approval of the 168-member RNC and then each state's election chief would have to abide by the party's proposed calendar or face consequences, such as losing delegates to the nominating convention. The states previously have ignored such penalties.
Priebus spoke with CBS's Face the Nation.