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and Sen. Ted Cruz -LRB- R-Texas -RRB- , who trailed right behind the frontrunners in the Republican and Democratic primaries , will debate each other and field questions from audience members in a town hall on CNN . 
CNN 's Dana Bash and Jake Tapper -- who questioned Republican primary candidates like Cruz during a debate in 2015 -- will moderate Wednesday night 's debate at 9 p.m. ET . 
The two senators diverge dramatically on the ideological spectrum , with Sanders describing himself as a "democratic socialist" and Cruz often seen as a staunch conservative . 
While Sanders has vilified rich corporations for their alleged greed , Cruz advocated for more than halving the corporate tax rate in September . 
According to Reuters , Cruz sought a 15-20 percent tax rate , similar to proposals issued by Trump and much lower than the current 35 percent rate . 
Cruz has argued for eliminating the estate tax , also known as the "death tax ," while Sanders has called for a progressive estate tax structure . 
Earlier this year , CNN hosted a debate between Sanders and Cruz on health care reform .
Bernie Sanders and Ted Cruz to Square Off During Televised Tax Reform Debate on Wednesday . 

The demonstrations outside a federal building in Manhattan were over the detention of Ravi Ragbir (RAH'-vee RAHG'-beer)  a citizen of Trinidad who has been fighting deportation after a fraud conviction.
His lawyer  Alina Das  says  Ragbir  was handcuffed Thursday during a scheduled check-in with immigration officials.
A protester holds a sign demanding the release of  detained Ravi Ragbir  a prominent immigration activist   Thursday  Jan. 11  2017  in New York. New York City police have arrested 18 people  including two councilmen  in protests over the detention of the activist. (AP Photo/Kathy Willens)
Police arrested demonstrators who sat in the street and blocked an ambulance  thinking  Ragbir  was inside. City Councilmen Ydanis Rodriguez and Jumanne Williams  both Democrats  were among those arrested.
Demonstrators arrested protesting the detention of  detained Ravi Ragbir  a prominent immigration activist   Thursday  Jan. 11  2017  in New York. New York City police have arrested more than a dozen people  including two councilmen  in protests over the detention of the activist. (AP Photo/Kathy Willens)
News of activist's detention leads to NYC supporter arrests

(CNN)  Nadia  was just 15 when ISIS fighters swarmed into  her  homeland.  She  says  she  was kidnapped  bought and sold by men who told  her  they owned  her   and repeatedly raped by them.
Three years on  the traumatized Yazidi is finally free of  her  captors  but remains trapped in a living nightmare  fearing the ISIS militants could still get to  her   or worse  kill members of  her  family.
The frail 18-year-old former slave doesn't even know if  her  mother  father and brother are still alive.
At a meeting in the Kurdistan region of Iraq   she  hides behind  her  cousin  one hand clenching  her  relative's shirt  the other holding tight to  her  own dress. Shell-shocked   she  cannot remember how many younger siblings  she  has  and struggles to recall their names.
 Nadia  was kidnapped by ISIS fighters who took over  her  Yazidi homeland when  she  was 15.
Nadia (not  her  real name) was among thousands of Yazidis captured by ISIS in August 2014 when the terror group launched an assault on Sinjar  then home to more than half a million members of this minority group.
 Nadia  and and  her  older sister Amira were separated from the rest of the family.  Their  mother was pregnant at the time  and  Nadia  doesn't know where she - or her baby - is now.
It was here   Nadia  says  that  she  witnessed an incident that still haunts  her : ISIS militants took a child away from his mother as  she  screamed for him.  Her  captors responded by hitting  her  on the head.  Nadia  still doesn't know what happened to the pair at the hands of the terrorists.
"They would tell us we sold you  we bought you "  she  says. "There were days we would wish we would die so no one says they sold us ... Beating and everything else is bearable  but not selling."
An Iraqi Kurdish investigator who asked to be identified as Shaima has heard stories like Nadia's dozens of times as she interviews freed Yazidis. "Some of them are eager to tell their story. Some of them are reluctant because they can't go into the details -- it's difficult for them " she says.
From Mosul   Nadia  and  her  sister were taken to Syria  where  Nadia  spent a year being moved between Homs  Tabqa  ISIS' self-declared capital  Raqqa  and Deir Ezzor.
 Nadia  says  her  sister Amira killed herself after she was forced to "marry" an ISIS fighter.
 Nadia  says  she  was repeatedly raped at the hands of  her  kidnappers.  Her  sister killed herself in captivity.
After her suicide   Nadia  says she was determined to get away. She and some other Yazidi captives tied their headscarves together to form a rope they used to climb out of the house where they were being held captive.
Sold to a Syrian ISIS fighter   Nadia  says  she  became pregnant; to avoid having a child conceived by rape   she  threw  herself  from walls and took pills to terminate the pregnancy.
"I did not want it  what else could I do?"  she  asks.

Bringing ISIS to justice for war crimes against Yazidis

