Maybe Rubio can get John Boehner, Eddie Cantor, and their likes, to campaign for him.
People who will not be campaigning for Rubio are Jeff Sessions and Sheriff Joe Arpaio.
You named all the guys who endorsed Bush. But here's the list of Rubio endorsements.
U.S. Governors (former)
Robert List, Nevada (former)[517]
George Pataki, New York (former); 2016 presidential candidate[518]
George Allen, Virginia (former Virginia Governor and Senator)[519]
Scott McCallum, Wisconsin (former)[520]
U.S. Senators (current and former)
Arizona: Jon Kyl (former)[521]
Arkansas: Tim Hutchinson (former)[522]
Colorado: Cory Gardner[523]
Idaho: Jim Risch[524]
Montana: Steve Daines[525]
Oklahoma: Jim Inhofe[526]
South Carolina: Tim Scott[527]
Texas: Phil Gramm (former)[528]
U.S. Representatives (current and former)
California: Doug LaMalfa,[529] and Darrell Issa[530]
Colorado: Mike Coffman[531]
Florida: Tom Rooney[3]
Georgia: Austin Scott[532]
Illinois: Darin LaHood[533]
Indiana: Todd Rokita,[534] Larry Bucshon[535] and Chris Chocola (former)[536]
Kansas: Mike Pompeo[537]
Kentucky: Anne Northup (former)[538]
Michigan: John Moolenaar,[539] and Bill Huizenga[540]
Missouri: Jason T. Smith[541]
North Carolina: Robin Hayes (former)[542]
Oklahoma: Markwayne Mullin[543]
South Carolina: Trey Gowdy[544]
South Dakota: Kristi Noem[537]
Tennessee: Zach Wamp (former).[545]
Utah: (Whole House Delegation) Chris Stewart,[546] Mia Love[547] Rob Bishop,[548] and Jason Chaffetz[549]
Virginia: Scott Rigell[550] and Barbara Comstock[551]
Washington: Jaime Herrera Beutler[552]
Wisconsin: Sean Duffy[553]
U.S. Ambassadors (former)
Skip Vallee, former Ambassador to Slovakia (20052007)[554]
Victor Ashe, former Ambassador to Poland (20042009) and former Bush supporter[555]
Republican National Committee members
(former)
Bill Armistead, chair of Alabama GOP (20112015)[556]
Jerry Labriola Jr., chair of Connecticut GOP (20112015).[557][558]
Robert Maginn, chair of Massachusetts GOP (20112013)[559]
Arnie Hederman, chairman of the Mississippi GOP (20112012)[560]
Ferrell Blount, former NCGOP chairman[542]
Stan Lockhart, former Utah GOP chair[546]
Business people
Wayne Berman, donor and fundraiser[649][650]
Norman Braman, former owner of the Philadelphia Eagles, billionaire[107][651][652]
Larry Ellison, co-founder and former CEO of Oracle Corporation[653]
Jose 'Pepe' Fanjul, sugar industry[107]
Paul Singer, businessman, investor, billionaire[654]
Frank L. VanderSloot, entrepreneur, radio network owner, rancher[655]
John Rakolta, CEO of Walbridge[656]
Kenneth C. Griffin, founder and CEO of Citadel[657]
Art Pope, philanthropist and businessman[658]
Gary Shapiro, President and CEO of the Consumer Electronics Association[659]
Larry Nichols, chairman of Devon Energy[660]