In an attempt to prevent Donald Trump from winning the Republican presidential nomination, candidates John Kasich and Ted Cruz have become sudden allies.

Last Sunday, the two candidates announced that they would join forces, attempting divide future primaries between the two so that they could possibly guide the nomination away from Trump before the Republican National Convention in Cleveland.

Kasich will focus on Oregon and New Mexico, the campaign said, and Cruz will attempt to win Indiana.

“To ensure that we nominate a Republican who can unify the Republican Party and win in November, our campaign will focus its time and resources in Indiana and in turn clear the path for Gov. Kasich to compete in Oregon and New Mexico,” Cruz’s campaign manager said Sunday in a statement.

Just a few minutes later, John Weaver, a member of Kasich’s campaign team wrote an additional statement.

“Our goal is to have an open convention in Cleveland, where we are confident a candidate capable of uniting the party and winning in November will emerge as the nominee,” he wrote.

Trump didn’t take long to respond to the new political relationship that CNN called “Ted Cruz and John Kasich: 2016 frenemies.” Late Sunday night, Trump tweeted, “Wow, just announced that Lyin’ Ted and Kasich are going to collude in order to keep me from getting the Republican nomination. DESPERATION!”

Throughout the race to the GOP nomination, Trump has led in the polls with a considerable margin.

In Indiana, Fox News polls show that Trump leads with 41 percent of the vote, followed by Cruz at 33 percent and Kasich at 16 percent. The Indiana primary will be held May 3.

NBC news reported that Kasich and Cruz have not been “friendly” to each other as of late, flinging names at each other while their aides argued in the hallways of the RNC Spring Meeting in Florida.

However, the level of courtesy shown to each other changed after Trump aides arrived at the Spring Meeting with news for party operatives that Trump may win the required 1,237 delegates for the nomination before the Republican National Convention.

Published April 25, an NBC article reported, “It became clear that the Cruz-Kasich feud was convincing top Republicans that it might be better to simply coalesce behind Trump,” and that is when Kasich and Cruz became more civil.

Only 578 delegates are left to go to any of the three candidates now after Tuesday’s primaries. Trump leads with 992, Cruz follows with 562, and Kasich trails with 152, according to the Associated Press.

The primaries will continue until June 14 when the D.C. Democratic primary closes.