TRENTON -- Gov. Chris Christie falsely claimed on Sunday that Republican presidential nominee Donald Trump abandoned his arguments that President Obama wasn't born in the U.S. as soon as the president released his birth certificate.

"Donald's now made his position on it clear, which is that after the president presented his birth certificate, Donald has said he was born in the United States, and that's the end of the issue," Christie said, appearing on CNN's "State of the Union" with Jake Tapper on Sunday morning.

The president released his short-form birth certificate in June 2008, and released certified copies of his original Certificate of Live Birth, or "long-form birth certificate" in April 2011.

Trump had called for the president to release his birth certificate in March 2011, saying "there's something on that birth certificate that he doesn't like."

Tapper pointed out that, in fact, Trump continued to advanced his "birther" conspiracy theory that Obama is not a natural-born U.S.citizen for five years after the president released his long-form birth certificate in April 2011.

"Jake, that's just not true," responded Christie. "It's just not true that he kept it up for five years...It wasn't like he was talking about it on a regular basis until then [last Friday]."

In fact, Trump repeatedly suggested in online social media posts in 2011, 2012, 2013 and 2014, that Obama's certificate was fake.

Attention all hackers: You are hacking everything else so please hack Obama's college records (destroyed?) and check "place of birth" — Donald J. Trump (@realDonaldTrump) September 6, 2014

Always remember, I was the one who got Obama to release his birth certificate, or whatever that was! Hilary couldn't, McCain couldn't. — Donald J. Trump (@realDonaldTrump) June 29, 2014

Pres. Obama is about to embark on a 17 day vacation in his ‘native’ Hawaii, putting Secret Service away from families on Christmas. Aloha! — Donald J. Trump (@realDonaldTrump) December 19, 2013

How amazing, the State Health Director who verified copies of Obama’s “birth certificate” died in plane crash today. All others lived — Donald J. Trump (@realDonaldTrump) December 12, 2013

“If you like your healthcare plan you can keep it.” = “I was born in Hawaii.” — Donald J. Trump (@realDonaldTrump) October 31, 2013

"@HoppMar: @realDonaldTrump I saw his brother in Kenya interviewed, HE may be wiser, actually." I'm so surprised his brother lives in Kenya — Donald J. Trump (@realDonaldTrump) September 20, 2013

Why are people upset w/ me over Pres Obama’s birth certificate?I got him to release it, or whatever it was, when nobody else could! — Donald J. Trump (@realDonaldTrump) August 22, 2013

In debate, @MittRomney should ask Obama why autobiography states "born in Kenya, raised in Indonesia." — Donald J. Trump (@realDonaldTrump) October 1, 2012

Wake Up America! See article: "Israeli Science: Obama Birth Certificate is a Fake" http://t.co/f7esUdSz — Donald J. Trump (@realDonaldTrump) September 13, 2012

What a coincidence--Michelle Obama called Kenya @BarackObama's "homeland" in 2008 http://t.co/lQKQ2C7n — Donald J. Trump (@realDonaldTrump) August 29, 2012

Why do the Republicans keep apologizing on the so called "birther" issue? No more apologies--take the offensive! — Donald J. Trump (@realDonaldTrump) August 27, 2012

An 'extremely credible source' has called my office and told me that @BarackObama's birth certificate is a fraud. — Donald J. Trump (@realDonaldTrump) August 6, 2012

Read this--@BarackObama's birth certificate "cannot survive judicial scrutiny" because of "phantom numbers" http://t.co/DIv9sLI2 — Donald J. Trump (@realDonaldTrump) July 23, 2012

Congratulations to @RealSheriffJoe on his successful Cold Case Posse investigation which claims @BarackObama's 'birth certificate' is fake — Donald J. Trump (@realDonaldTrump) July 18, 2012

In his own words, @BarackObama "was born in Kenya, and raised in Indonesia and Hawaii." This statement was made, (cont) http://t.co/nIsSypv9 — Donald J. Trump (@realDonaldTrump) May 30, 2012

Made in America? @BarackObama called his 'birthplace' Hawaii "here in Asia." http://t.co/dQka2PIr — Donald J. Trump (@realDonaldTrump) November 18, 2011

It was only last Friday that Trump declared that "President Barack Obama was born in the United States. Period." during a Washington D.C. press conference.

However, at the same event, Trump accused Hillary Clinton's campaign of raising the issue in 2008, something that Christie also advanced on Sunday.

"It was a contentious issue, and by the way, an issue that Patti Solis Doyle, of the Clinton campaign in 2008 had recently admitted Mrs. Clinton also injected into her campaign in 2008 in a very quiet but direct way against then-Sen. Obama," Christie said on CNN on Sunday.

That is also false: Clinton never publicly questioned Obama's citizenship, and on Friday, Clinton's 2008 campaign manger Solis Doyle told CNN that it fired an Iowa volunteer coordinator for putting forward an email that promoted the 'birther' conspiracy against Obama."

.@MoElleithee @AriFleischer I fired the rogue & I called @davidplouffe to apologize 4 said rogue https://t.co/A2ehJQUtGQ — Patti Solis Doyle (@PattiSolisDoyle) September 16, 2016

Meanwhile, the governor also dismissed the idea that Trump's birther history would hurt him with voters.

"If you think that anyone is going to vote for Donald Trump or Hillary Clinton, or against either one of them based upon this issue, then I think there's a fundamental misunderstanding of the concerns of the American people," Christie said.

Claude Brodesser-Akner may be reached at cbrodesser@njadvancemedia.com. Follow him on Twitter @ClaudeBrodesser. Find NJ.com Politics on Facebook.