This editorial in the WSJ responds to Donald Trump's comments about the system being "corrupt" and "crooked" and saying there could be violence at the convention. It says the rules are transparent and long standing in Wyoming, Colorado and other states where Trump has not campaigned or sought support. It calls on the Republican National Committee not to be intimidated by Trump's statements, especially as it says the the Republican party should not nominate a candidate who has the highest negative perceptions rating of a shocking 65% with national voters in a general election. Trump never complained when he won 99 delegates in Florida with 45% of the vote and 50 delegates in South Carolina with 32% of the votes cast- securing the most delegates because of a winner take all or winner take most system. It says Trump has so far won only 37% of all votes cast and won about 45% of the delegates, a process that can be seen as disproportionately favoring Trump because of the rules. This is particularly true because Trump's core support has remained at about 35%, and the fragmentation of the remaining vote has hurt the other candidates. About 83% of eligible voters have not voted in the primaries, making the process less representative than it should be. ...