Donald Trump, GOP frontrunner and now presumptive GOP nominee for the 2016 presidential race has accused his former primary rivals former Governor Jeb Bush and Senator Lindsey Graham of violating a pledge they signed to support the Republican Party’s nominee.

“Jeb Bush isn’t an honorable person. Lindsey Graham isn’t an honorable person,” Trump said at a rally in Spokane, Washington, ahead of the state’s May 24 primary.

Allegedly, all 17 major GOP candidates in September 2015 signed a Republican National Committee-issued loyalty pledge that committed signees to not support a candidate from another party or to run as an independent or write-in.

The RNC acknowledged Donald J. Trump as their presumptive nominee following his decisive primary win in Indiana on Tuesday that led his final two rivals, Senator Ted Cruz and Governor John Kasich, to drop out of the race.