Apparently, Ron Paul has enough delegates to force the Romney's choice for Veep to go through a floor fight due to a rule change. That means that the delegates can reject Romney's nominee and enter Paul's name into nomination for veep. That would mean the RNC would have to poll every single delegate on the floor of the convention's choice for Veep and go to a Roll Call Vote that could take up a better portion of a day.
For example, if Romney chose Sen. Rob Portman (R-Ohio) as his vice presidential pick, but the Paul forces leveraged their impressive foothold in several states to nominate Paul from the floor, then someone like Sen. Marco Rubio (R-Fla) could emerge as the preferred pick for many delegates as the convention goes into a roll call vote. And Rubio's name could be entered into nomination, in addition to Paul's, if a plurality of five states voted to nominate him. And he already has Iowa, Minnesota, Nevada, Maine, while Louisiana is still in doubt.
Read about it here. Wouldn't that be cool AF?
http://www.huffingtonpost.com/2012/06/20/ron-paul-vice-president-nomination-republican-national-convention_n_1613763.html