How have Republicans defended Trump's "Go Back" tweets?

Question

On July 14th, 2019, President Trump posted series of 3 tweets which targeted Representatives Alexandria Ocasio-Cortez of New York, Ilhan Omar of Minnesota, Ayanna S. Pressley of Massachusetts and Rashida Tlaib of Michigan and encouraged them to "go back ... [to the] places from which they came", despite 3 of the 4 being born in the United States, and all 4 being US Citizens.

Direct link to tweet:

So interesting to see “Progressive” Democrat Congresswomen, who originally came from countries whose governments are a complete and total catastrophe, the worst, most corrupt and inept anywhere in the world (if they even have a functioning government at all), now loudly and viciously telling the people of the United States, the greatest and most powerful Nation on earth, how our government is to be run. Why don’t they go back and help fix the totally broken and crime infested places from which they came. Then come back and show us how it is done. These places need your help badly, you can’t leave fast enough. I’m sure that Nancy Pelosi would be very happy to quickly work out free travel arrangements!

This statement has been widely characterized as racist, including by the House of Representatives who passed a resolution condemning it, but it has also been defended by many Republicans, who argue that there's nothing racist about it.

What arguments have public figures given in defense of these tweets? Published statements are preferred, ideally with explanation of the context behind these arguments.

Answer 1

In short they're basically spinning it as move along, nothing to see, while throwing counter accusations at the Democrats:

This time, while Democrats and some independents may see clear signs of racial intolerance woven throughout Trump’s tweets, Republicans are hearing a different message, said Vincent Hutchings, a political science and African-American studies professor at the University of Michigan.

“To Republicans, Trump is simply saying: ‘Hey, if you don’t like America, you can leave,” Hutchings said. “That is not at all controversial. If you already support Trump, then it’s very easy to interpret his comments that way.”

By criticizing liberal members of the House, Trump is “doing exactly what Republicans want him to do,” Hutchings said. “He’s taking on groups that they oppose.”

Here's for instance Kellyanne Conway:

Counselor to the president Kellyanne Conway said on "America's Newsroom" Tuesday that Democrats' claims of racism, sexism and xenophobia against President Trump have become "tired," adamantly disagreeing with her husband's labeling of Trump as a "racist."

Or a random church in Virginia:

Virginia church posts 'America: Love or Leave It' sign days after Trump's 'go back' tweet to lawmakers

Or Ben Carson:

Ben Carson defends Trump amid feud with House Dems: 'He's not a racist'

Also, crowds at Trump rallies are now chanting "Send her back!".

There are some dissenting voices (example; two more) -- but not that many.

Answer 2

An article by The Intelligencer sums up the reactions of Republicans to Trumps's rants.

It includes:

• Backing the President by attacking the liberals just as vehemently as he did, but without the racial/misogynist/xenophobic flavour of the shots:

We all know that AOC and this crowd are a bunch of communists.
Lindsey Graham, Fox & Friends

• Suggesting Trump's rants should rather aim at politics:

Aim higher! We don’t need to know anything about them personally, talk about their policies
ibid

Just because the so-called squad constantly insults and attacks the president isn’t a reason to adopt their unacceptable tactics. There is plenty to say about how destructive House Democrats’ policies would be for our economy, our health care system, and our security
Roy Blunt

• Avoid questions on the subject, seemingly afraid both of being associated with the rants, or of looking unfaithful to the President:

I’m working as hard as I can to reduce health-care costs. I’m not giving a daily commentary on the president’s tweets.
Lamar Alexander

I haven’t read that but I’ll check it out.
Richard Shelby

• The article also mentions that: "When forced to express discomfort, they will disassociate his latest outrage from his character. Trump may have said something racist, his allies will concede, but Trump cannot be a racist.", but it doesn't provide a direct quotation to sustain it.

• One Republican Representative is quoted as using the epithet "racist" about the tweets.

Trump’s tweets from this weekend were racist and he should apologize.
Mike Turner

Yet when the Democrats in the House proposed a resolution to condemn Trump’s tweets as racist, he still opposed it. Only four Republican Representatives (Indiana’s Susan Brooks, Pennsylvania’s Brian Fitzpatrick, Texas’s Will Hurd and Michigan’s Fred Upton) voted in favor.

Indeed, Will Hurd had expressed a similar opinion:

I think those tweets are racist, and xenophobic. They're also inaccurate. The four women he's referring to are actually citizens of the United States. Three of the four were born here. It's also behavior that's unbecoming of the leader of the free world. He should be talking about things that unite, not divide us.

Answer 3

This question is based on one big implicit assumption: those tweets are considered as racist and really problematic by people for whose votes Trump is fighting. Which seems not to be the case. Seriously, the missing part of the puzzle that the seriously offended people who see everywhere racist undertones are generally anyway hard-line Democrats, so from Trump's perspective making them more vivid would not change anything in his incoming election.

From Republican party there is not even much point in going in to damage control mode. Trump strategy seems to be to boost standing of the most radical faction of Democratic Party, because his main hope is to get as his main opponents people, who in his opinion would be even less palatable for swing voters than him.

EDIT, clarification:

• the statement could be interpreted by supporters as more or less harmless "love or leave" and claims about racist undertones as merely evidence that some oversensitive people see racism everywhere (race is nowhere mentioned explicitly, and could be only very indirectly inferred from those unsuccessful countries, while neglecting alternative explanation that it has nothing to do with race, but is simply matter of failed policies)
• regardless of that, I don't think that they care about the whole issue at all, and consider it as pointless bickering of politicians (with heroic efforts of Nancy Pelosi to pass a resolution condemning those twits, may possibly even consider that the opposing party is going big on pointless bickering)

Simple check: Trump already said on multiple occasion nasty stuff, that was supposed to end his political carrier. Nevertheless it somehow worked, at least so far, so maybe he has some gut feeling what is acceptable for his electorate.