(CNN)President Donald Trump will not meet North Korean leader Kim Jong Un
 next month for what would have been a historic diplomatic summit, he 
announced in a letter to Kim released by the White House Thursday 
morning.

"I was very 
much looking forward to being there with you. Sadly, based on the 
tremendous anger and open hostility displayed in your most recent 
statement, I feel it is inappropriate, at this time, to have this 
long-planned meeting," Trump wrote. "Therefore, please let this letter 
serve to represent that the Singapore summit, for the good of both 
parties, but to the detriment of the world, will not take place."

Trump
 and Kim were scheduled to meet in Singapore on June 12, for what would 
have been the first face-to-face meeting between a US and North Korean 
leader.



READ: President Donald Trump's letter to Kim Jong Un canceling the summit

Trump
 withdrew from the summit after a North Korean vice minister of foreign 
affairs slammed Vice President Mike Pence on Wednesday as a "political 
dummy," the latest harshly worded statement from Pyongyang.

Trump
 and his aides were infuriated by the statement and wanted to respond 
forcefully, multiple people familiar with the situation told CNN. The 
specific and personal targeting of Pence is what irked US officials, 
three people familiar with the matter said.

The White House was developing a response to the rhetoric on Thursday morning. 

On
 Wednesday, CNN reported the Trump administration was looking to have 
additional high level talks for assurances from Kim for complete 
denuclearization before the summit went ahead.



Trump administration wants more high-level talks with North Korea before summit

Hours
 later, a North Korean official lashed out at Pence and said Pyongyang 
is ready for a nuclear showdown if dialogue with the United States 
fails.

Choe Son Hui, a 
vice-minister in the North Korean Foreign Ministry, said if the US 
continued on its current path, she would suggest to North Korea's 
leadership that they reconsider the planned summit between Trump and 
Kim.

"Whether the US will meet us 
at a meeting room or encounter us at nuclear-to-nuclear showdown is 
entirely dependent upon the decision and behavior of the United States,"
 Choe said in comments carried by North Korea's state-run KCNA news 
agency Thursday.

Choe was responding to comments by Pence made Monday during a Fox News interview that she deemed "unbridled and impudent."

CNN's Allie Malloy contributed to this report.