The US can block sale of the radar to Brazil.
You fail to understand that the Gripen is full of US technology and none of that is going to Brazil without US consent.
You might also wish to read the election results from the US today. Sen John McCain is the new Chairman of the Senate Armed Services Committee come January. You might wish to explore his views on the leftist governments of Brazil.
You keep going on about the radar. Why do you think the USA can block its sale?
You've not responded to the information I gave about the radar in my previous post: it's a British-Swedish development of a British radar (made by a British subsidiary of an Italian firm), which is marketed as ITAR-free. Why, having gone to the trouble of keeping it ITAR-free up to the point where it was selected for Gripen, would it then have US content added?
Selex Galileo is not based in the USA. Most of its staff are in Italy & the UK. The US branch, Selex Galileo Inc., does not do radar development, according to its own website. Why would it be tasked with something it does not normally do, on a product which up to that point had been deliberately kept free of US content?
So, I ask again - why do you think the USA can block sale of the radar?
The main US content of Gripen is, as it always has been, in the engine, most of which is US-designed & for Gripen E, US-built.
And as you've already been asked, why would the USA start blocking the sale of exactly the same technology to Brazil that until Gripen was selected it was actively trying to sell, to a government headed by the same president - & which it started trying to sell when Bush was president?