Teamsters endorsed Ronald Reagan for President in 1980 and 1984. Teamster Union rank and file of 1.7 million voted for Reagan re-election, 53.7% to 43.6 for Mondale-NY Times, 8/31/1984

.
1984 NY Times article

8/31/1984, "Teamsters Vote to Endorse Reagan," NY Times, Gerald R. Boyd, Columbus, Ohio

"The International Brotherhood of Teamsters became the first major labor union to endorse President Reagan for re-election. 

The endorsement came after the results of a mail survey in which 25,841 of the union's 1.7 million members responded, the union said in a statement. Results of the survey showed 53.6 percent favored Mr. Reagan and 43.6 percent backed his Democratic opponent, Walter F. Mondale, said the teamsters' general president, Jackie Presser. 

Mr. Presser said the teamsters' 21- member board had voted unanimously to endorse Mr. Reagan. 

''It is with great, great, great pride that this international acknowledges the fact that our membership had an opportunity to vote and cast their ballots for whom they felt would be best to serve this nation,'' he said. 

Later, Mr. Presser praised Mr. Reagan by saying that he had found the President to be tough, firm and fair. The endorsement by the union, which supported Mr. Reagan in 1980, appeared to be anticipated by Reagan campaign officials....

Mr. Bush and others in the Reagan re-election campaign had been banking on the endorsement to counter organized labor's overwhelming support of Mr. Mondale. Both Mr. Bush and Mr. Presser sought to portray the endorsement as reflecting the desire of rank- and-file labor members as opposed to union bosses. 

''It means a lot to us that we are getting the endorsement of the only large union in the country that really has polled its entire membership,' Mr. Bush said, ''getting back a good percentage response.... 
........... 

Hopes for Blue-Collar Support 

Mr. Bush reflected the hope that the Reagan campaign would garner blue- collar support in this election. ''I think we are doing well among blue-collar voters because they understand the values we strive for,'' he said at an airport news conference. 

Later, he sounded a familiar campaign theme that the economy had improved under Mr. Reagan's leadership....

Mr. Bush dismissed any suggestion that the endorsement from the union, which has had public disagreements with the Reagan Administration over enforcment of Federal labor laws, had resulted from a deal. Mr. Presser has complained to the White House about the union's difficulties in getting favorable rulings from Mr. Reagan's appointees on the National Labor Relations Board and demanded the ousting of its chairman, Donald L. Dotson....

''If you are trying to imply that there is some deal, there is no deal,'' he said. ''There is no suggestion of a deal and no deal."... 
........... 

Mr. Bush was greeted by Mr. Presser as he arrived at a hotel here where he spoke and inspected a blue rig with gold lettering that included ''Teamsters: A Part of American Life.'' He then met briefly with board members before the address."

.......................

==================

Comment: The Bush crowd despised Reagan and fought viciously to prevent him from getting the Republican nomination in 1976 and 1980. Incredibly, Reagan turned around and named Bush his VP and cursed the country with the Bush crowd for decades.

...............................
.........................

Added: In 2015, Teamsters are waiting on Biden, may consider Trump:

9/29/15, "Whoa – Reports That Teamsters Union Considering Donald Trump Endorsement….," The Conservative Treehouse, sundance
 
"Candidate Donald Trump supports U.S. first pro-growth polices including: Keystone Pipeline, renegotiating NAFTA, withdrawal from the current Trans-Pacific Trade Deal, border security, immigration reform and renewed financial efforts targeted to boost the middle-class worker. These are very favorable policy positions for the Teamsters Union."...

............................