Which branch has the power to decide whether laws are constitutional?

Rather, Congress deemed them necessary and established them using power granted from the Constitution. Section 2 of Article III gives the Supreme Court judicial power over “all Cases, in Law and Equity, arising under this Constitution”, meaning that the Supreme Court's main job is to decide if laws are constitutional.

the first part of the statute of limitations is the standard deadline, which gives victims of medical malpractice a certain number of years -- usually anywhere from two to six years, depending on the state -- after the malpractice occurred within which to file a lawsuit.

keep quite, set up,sorry