Despite some early gains in their bid to win a House majority, Democrats missed some early opportunities for a potential wave election.
The result will come as a relief to the Democratic Party, which could not afford to lose a Senate seat from what is usually a solid blue state.
In a statement responding to Trump's tweet, Menendez campaign spokesman Steven Sandberg responded simply: "Thank you."
As the midterm elections draw closer, the Republican stranglehold on the Senate has shown few signs of slipping. If Republicans can hold or expand their majority, President Donald Trump can continue to push to confirm conservative judges.
Prognosticators believe Republicans have a strong grasp on the Senate even as massive fundraising numbers help Democrats in their bid to take the House.
"The one thing I've learned from John McCain above all else is that, in moments like this, you have to embrace your values," Graham said. "No more transactional interactions."
In August, the Puerto Rican government raised the official death count dramatically to 2,975, after maintaining for months that only 64 people had died.
While the New Jersey Senate race appears much closer than Democrats would want it, the state's partisan leanings still favor Menendez over Hugin.
The developments come as Democrats look to at least hold the line in the Senate, where the GOP holds a slim 51-49 majority.
The Senate minority leader, the vice chair of the Senate Intelligence Committee, and more than a dozen members of the Senate Foreign Relations committee all called on the president to cancel the meeting.
The primary outcomes show Menendez will have to labor to keep a blue-state seat amid the challenge from Hugin.
The primary election results in states such as California, New Jersey and Iowa will help to determine whether Republicans keep their House majority.
Races in California, New Jersey and Iowa will have a major role in which party holds the House after November.
For years sidelined on the national political fringe, California has lurched to the center of the fight for control of Congress.
Former Celgene CEO Bob Hugin is trying to take down scandal-wracked New Jersey Sen. Bob Menendez in what could become a nasty race.
Republican lawmakers saw the meeting with Kim Jong Un as potentially treacherous or doomed to fail.
"Sadly, based on the tremendous anger and open hostility displayed in your most recent statement, I feel it is inappropriate, at this time, to have this long-planned meeting," Trump writes to Kim.
Prosecutors said Dr. Salomon Melgen was the nation's highest-paid Medicare provider for five straight years.
Bob Hugin, former Celgene chairman and CEO, talks about why he is challenging Sen. Bob Menendez for his Senate seat in New Jersey, and the changes he would like to see in Washington, DC.
Prosecutors earlier this month said they wanted to retry Menendez after a mistrial, but a judge's ruling hampered that plan.