"I think when the president-elect, who's also the head of your party, tells you before he's even inaugurated that he doesn't wish to pursue these charges, it sends a very strong message, tone and content to the members," Trump spokeswoman Kellyanne Conway said in an interview on MSNBC's Morning Joe.
Conway was Trump's campaign manager and serves on his transition team.
During the campaign, Trump threatened to investigate the Democratic presidential nominee. During the second presidential debate in St. Louis, he said, "If I win, I am going to instruct my attorney general to get a special prosecutor to look into your situation."
Chants of "lock her up" were a refrain of supporters at his rallies and during the Republican National Convention in Cleveland. He criticized her use of private email server as secretary of state and alleged corruption at the Clinton Foundation.
"Look, I think he's thinking of many different things as he prepares to become the president of the United States, and things that sound like the campaign are not among them," Conway said.
Trump took a softer tone toward Clinton after the election, noting a gracious concession phone call.
"I think Hillary Clinton still has to face the fact that a majority of Americans don't find her to be honest or trustworthy, but if Donald Trump can help her heal, then perhaps that's a good thing."
When asked by Lesley Stahl during a post-election interview on 60 Minutes whether he'd appoint a special investigator to prosecute Clinton, he said; "Well, I'll tell you what I'm going to do, I'm going to think about it. Um, I feel that I want to focus on jobs, I want to focus on healthcare, I want to focus on the border and immigration and doing a really great immigration bill. We want to have a great immigration bill. And I want to focus on all of these other things that we've been talking about."