Ted Cruz held an unscheduled press conference today, the main purpose of which seems to have been to highlight the fact that the Trump campaign has threatened to sue him over ads his campaign is running in South Carolina, highlighting his pro-choice record. Cruz opened the press conference by reading portions of the letter, and declaring that if Trump filed the lawsuit, he would respond with a motion for sanctions. Take a look:

Cruz: By threatening that if we will not pull down the ad, Mr. Trump will seek immediate legal action to prevent the continued broadcast of this ad and to hold me jointly and severally liable to the fullest extent of the law for any damages resulting therefrom. You know, I have to say to Mr. Trump, you have been threatening frivolous lawsuits for your entire adult life. Even in the annals of frivolous lawsuits, this takes the cake. So Donald, I want to encourage you that if you want to file a lawsuit challenging this ad, claiming it is defamation, file the lawsuit.

It is a remarkable contention that an ad that plays video of Donald Trump speaking on national television is somehow defamation. The operative words in that ad come from Donald Trump's own mouth.

Cruz went on in this vein for quite some time, outlining what a ridiculous legal threat Trump is making here. Consider the gauntlet thrown down on this one.

UPDATE: Here is the letter itself, if anyone wants to see it.