Newark, New Jersey (CNN) A federal judge in Newark denied Sen. Bob Menendez's attempt to toss out the Justice Department's bribery case against him Monday morning.

The trial, now in its seventh week, will turn to the defense case as lawyers for the New Jersey Democrat and Dr. Salomon Melgen, a wealthy ophthalmologist from Florida, try to convince jurors that prosecutors have wrongly twisted a longtime friendship into an illegal bribery scheme.

The heart of the Justice Department's case rests on accusations that Menendez accepted political contributions, free rides on private jets and a swanky hotel suite in Paris from Melgen in exchange for agreeing to pressure other high-level federal officials in the executive branch to help resolve his wealthy friend's business problems -- "official acts" prosecutors claim put Menendez on the hook under federal bribery law.

Judge William Walls continued to hear arguments from lawyers Monday morning about whether he should throw out the charges against the two men in light of a 2016 Supreme Court decision unanimously overturning former Virginia Gov. Bob McDonnell's bribery conviction.

The defense team urged Walls that the prosecution's overarching "stream of benefits" theory -- where many gifts are exchanged for a variety of political favors over a period of several years -- cannot survive post-McDonnell. Lawyers for the defense argued that the prosecution had to show a more direct link between a specific gift followed by a specific political favor.

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