Stan This is a direct copy, in part, of the DHS statement regarding their 100 mile border search and seizure policy.
The border search exception is a doctrine of United Statescriminal law that allows searches and seizures at international borders and their functional equivalent without a or probable cause.
This doctrine is not actually an exception to the Fourth Amendment, but rather to the Amendment's requirement for a warrant (or probable cause). Balanced against the sovereign's interests at the border are the Fourth Amendment rights of entrants. Not only is the expectation of privacy less at the border than in the interior  the Fourth Amendment balance between the interests of the Government and the privacy right of the individual is also struck much more favorably to the Government at the border. This balance at international borders means that routine searches are "reasonable" there, and therefore do not violate the Fourth Amendment's proscription against "unreasonable searches and seizures".
Border searches more invasive than "routine" require some suspicion. See the section below.
Despite federal law allowing certain federal agents to conduct suspicionless search and seizures within 100 miles of the border, the Supreme Court has clearly and repeatedly confirmed that the border search exception applies only at international borders and their functional equivalent (such as international airports).
Stan, You asked for more details on the 100 mile border areas set up by the DHS. I don't really have much more than I put in my blog; however I do have the capability to research it a little further and will get back to you.
Rush Limbaugh Explains How Robert Mueller Will Attempt To Financially Destroy President Trump
Special Counsel Robert Mueller has crossed President Trump’s “red line” after issuing a subpoena for documents related to the Trump Organization’s business dealings with Russia.
New York Times reports:
The special counsel, Robert S. Mueller III, has subpoenaed the Trump Organization to turn over documents, including some related to Russia, according to two people briefed on the matter. The order is the first known time that the special counsel demanded documents directly related to President Trump’s businesses, bringing the investigation closer to the president. […] The Trump Organization has said that it never had real estate holdings in Russia, but witnesses recently interviewed by Mr. Mueller have been asked about a possible real estate deal in Moscow. In 2015, a longtime business associate of Mr. Trump’s emailed Mr. Trump’s lawyer Michael Cohen at his Trump Organization account claiming he had ties to President Vladimir V. Putin of Russia and said that building a Trump Tower in Moscow would help Mr. Trump’s presidential campaign.
Radio host Rush Limbaugh theorized on his program Friday that one of Mueller’s true objectives is to financially destroy President Trump.
Partial transcript via Breitbart News:
And these requests, the subpoena for documents from the Trump Organization, I ask you again, what has that to do with the campaign and with collusion and with the Russians? They’ve already been looking into Trump business in Russia with the Miss, what is it, USA, whatever his pageant is.
Do you all remember during the early days of the campaign there was news that Trump, in a tax return something like 20 years ago, took a $900 million deduction that was granted and survived an audit by the IRS? Now, I forget the details. It had to do with losses that he had incurred in that year in building things. It was around 900 or $920 million deduction. I’ll never forget when it was reported because most people will never come close to ever having that in a lifetime, and to have a guy personally write that much off?
Anyway, I think Mueller wants that $920 million back. I think Mueller wants to prove that that was a faulty deduction. I think that they want to go back, they want to get Trump’s tax returns because they want to nullify that $900 million deduction, and then they want to collect 20 years of interest and penalties and wipe Trump out.
In the meantime, President Trump’s lawyers are in the process of negotiating with special counsel Robert Mueller to bring the Russia probe to an end, reports Rebecca Ballhaus and Peter Nicholas of the Wall Street Journal.
Mueller’s tentacles continue to reach further and further.
CNN reported that investigators are attempting to determine whether former Blackwater chief Erik Prince misled the House Intelligence Committee about a meeting he had in Seychelles in January of 2017.
Prince is accused of using the meeting as an opportunity to establish a secret back channel with Russia.
Fox News’ Catherine Herridge spoke with one of President Trump’s personal lawyers about the new subpoena request by Special Counsel Mueller.
According to Herridge, Trump’s lawyer was unaware of the subpoena and said it may be a ‘wrap up’ subpoena or ‘clean up’ subpoena which may signal the end of the investigation.