"Just a minute ago, I tweeted on Twitter a tweet that Donald sent in 2013," Cruz said during a Boston Herald Radio interview. He was referring to an August 2013 tweet in which the Republican presidential front-runner wrote: "Congress must protect our borders first. Amnesty should be done only if the border is secure and illegal immigration has stopped." Cruz said on the radio on Thursday that Trump was backing the legislative effort partially led by another presidential candidate, Sen. Marco Rubio (R-Florida). "Now in 2013, I was leading the fight against Marco Rubio's 'Gang of Eight' amnesty plan," Cruz...