what does a brokered convention mean?
They pick the candidate no matter who we want.
A brokered convention is one where no one has enough delegates committed to him/her to be nominated on the first ballot. It has been nearly 100 years since there was a truly brokered convention. In 1932 Franklin Roosevelt emerged as a compromise candidate. In the infamous 1922 Democratic convention, when the “Wets” and the “Drys” battled 102 ballots were cast before a relatively unknown candidate was chosen, John W. Davis of WV. This was because 2/3 of all the delegates were required for nomination.
It is highly unlikely that the Republican convention will end in a brokered convention. Why?
1. There are simply no “power bosses” anymore. The last was Richard Dailey in Chicago in 1968. There is no one who commands large numbers of delegates.
2. By the late Spring this candidates will be sorted out. I believe that the three remaining will be Trump, Cruz, and Rubio. Even if there is a desperation on the part of the establishment to nominate Rubio the delegates won't be there. In 1964 there was a desperate attempt to deny Barry Goldwater the nomination. But the votes just weren't there.
3. If Trump “runs the table” I personally think that the establishment Republicans will find a way cozy up to him. They despised Reagan, but when it became obvious that he was going to be the nominee and gain the levers of power in the party, the country club Republican found a way to fall in line. I think this will happen if Cruz emerges as well.
Anyway, that is my two cents worth. With needing just 50% of the delegates it is extremely hard to find a scenario where the leaders can throw their weight behind someone who has not proven himself in the primaries. There are just too many primaries, unlike the days when most delegates were chosen by the few leaders.