INVESTIGATED FULLY. OUR HALLIE JACKSON HAS DETAILS. OUR HALLIE JACKSON HAS DETAILS.>>A SERIOUS AND DETAILS.>>A SERIOUS AND SIGNIFICANT ESCALATION>>A SERIOUS AND SIGNIFICANT ESCALATION TONIGHT AS THE WHITE SIGNIFICANT ESCALATION TONIGHT AS THE WHITE HOUSE NOTIFIES HOUSE TONIGHT AS THE WHITE HOUSE NOTIFIES HOUSE DEMOCRATS IN A LETTER HOUSE NOTIFIES HOUSE DEMOCRATS IN A LETTER THAT THE PRESIDENT, DEMOCRATS IN A LETTER THAT THE PRESIDENT, QUOTE, CANNOT PERMIT THAT THE PRESIDENT, QUOTE, CANNOT PERMIT HIS ADMINISTRATION TO QUOTE, CANNOT PERMIT HIS ADMINISTRATION TO PARTICIPATE IN THIS HIS ADMINISTRATION TO PARTICIPATE IN THIS PARTISAN INQUIRY, PARTICIPATE IN THIS PARTISAN INQUIRY, URGING SPEAKER NANCY PARTISAN INQUIRY, URGING SPEAKER NANCY PELOSI TO ABANDON THE URGING SPEAKER NANCY PELOSI TO ABANDON THE IMPEACHMENT EFFORT AND PELOSI TO ABANDON THE IMPEACHMENT EFFORT AND ACCUSING DEMOCRATS OF IMPEACHMENT EFFORT AND ACCUSING DEMOCRATS OF TRYING TO REVERSE THE ACCUSING DEMOCRATS OF TRYING TO REVERSE THE RESULTS OF THE 2016 TRYING TO REVERSE THE RESULTS OF THE 2016 ELECTION. RESULTS OF THE 2016 ELECTION. ALREADY THE TRUMP ELECTION. ALREADY THE TRUMP ADMINISTRATION IS ALREADY THE TRUMP ADMINISTRATION IS BLOCKING A KEY WITNESS ADMINISTRATION IS BLOCKING A KEY WITNESS FROM A DEPOSITION BLOCKING A KEY WITNESS FROM A DEPOSITION TODAY. FROM A DEPOSITION TODAY.>>THAT IS AN ABUSE OF TODAY.>>THAT IS AN ABUSE OF POWER FOR HIM TO ACT>>THAT IS AN ABUSE OF POWER FOR HIM TO ACT IN THIS WAY, AND THAT POWER FOR HIM TO ACT IN THIS WAY, AND THAT IS — THAT IS ONE OF IN THIS WAY, AND THAT IS — THAT IS ONE OF THE REASONS THAT WE IS — THAT IS ONE OF THE REASONS THAT WE HAVE AN IMPEACHMENT THE REASONS THAT WE HAVE AN IMPEACHMENT INQUIRY. HAVE AN IMPEACHMENT INQUIRY.>>Reporter: HOUSE INQUIRY.>>Reporter: HOUSE DEMOCRATS LATE TONIGHT>>Reporter: HOUSE DEMOCRATS LATE TONIGHT ISSUING A SUBPOENA DEMOCRATS LATE TONIGHT ISSUING A SUBPOENA AGAINST THAT WITNESS. ISSUING A SUBPOENA AGAINST THAT WITNESS. EUROPEAN UNION AGAINST THAT WITNESS. EUROPEAN UNION AMBASSADOR GORDON EUROPEAN UNION AMBASSADOR GORDON SONDLAND. AMBASSADOR GORDON SONDLAND. HE IS A ONE-TIME TRUMP SONDLAND. HE IS A ONE-TIME TRUMP DONOR AT THE CENTER OF HE IS A ONE-TIME TRUMP DONOR AT THE CENTER OF QUESTIONS OF WHAT THE DONOR AT THE CENTER OF QUESTIONS OF WHAT THE PRESIDENT MAY HAVE QUESTIONS OF WHAT THE PRESIDENT MAY HAVE PROMISED THE UKRAINIAN PRESIDENT MAY HAVE PROMISED THE UKRAINIAN LEAD FER HE HELPED PROMISED THE UKRAINIAN LEAD FER HE HELPED INVESTIGATE JOE BIDEN. LEAD FER HE HELPED INVESTIGATE JOE BIDEN. ACCORDING TO TEXTS INVESTIGATE JOE BIDEN. ACCORDING TO TEXTS RELEASED LAST WEEK, A ACCORDING TO TEXTS RELEASED LAST WEEK, A TOP DIPLOMAT MESSAGED RELEASED LAST WEEK, A TOP DIPLOMAT MESSAGED SONDLAND, “I THINK TOP DIPLOMAT MESSAGED SONDLAND, “I THINK IT’S CRAZY TO WITHHOLD SONDLAND, “I THINK IT’S CRAZY TO WITHHOLD SECURITY CLEARANCE FOR IT’S CRAZY TO WITHHOLD SECURITY CLEARANCE FOR HELP WITH A POLITICAL SECURITY CLEARANCE FOR HELP WITH A POLITICAL CAMPAIGN.” HELP WITH A POLITICAL CAMPAIGN.” SONDLAND, AFTER CAMPAIGN.” SONDLAND, AFTER TALKING WITH PRESIDENT SONDLAND, AFTER TALKING WITH PRESIDENT TRUMP, ACCORDING TO A TALKING WITH PRESIDENT TRUMP, ACCORDING TO A SOURCE WITH KNOWLEDGE TRUMP, ACCORDING TO A SOURCE WITH KNOWLEDGE OF THE SITUATION SOURCE WITH KNOWLEDGE OF THE SITUATION TEXTING BACK THIS — OF THE SITUATION TEXTING BACK THIS — “THE PRESIDENT HAS TEXTING BACK THIS — “THE PRESIDENT HAS BEEN CRYSTAL CLEAR, NO “THE PRESIDENT HAS BEEN CRYSTAL CLEAR, NO QUID PRO QUOS OF MY BEEN CRYSTAL CLEAR, NO QUID PRO QUOS OF MY KIND, ADDING I SUGGEST QUID PRO QUOS OF MY KIND, ADDING I SUGGEST WE STOP THE BACK AND KIND, ADDING I SUGGEST WE STOP THE BACK AND FORTH BY TEXT. WE STOP THE BACK AND FORTH BY TEXT. NOW SOME DEMOCRATS FORTH BY TEXT. NOW SOME DEMOCRATS WANT SONDLAND TO NOW SOME DEMOCRATS WANT SONDLAND TO RESIGN. WANT SONDLAND TO RESIGN.>>IF THAT’S WHAT THE RESIGN.>>IF THAT’S WHAT THE AMBASSADOR NEEDS TO DO>>IF THAT’S WHAT THE AMBASSADOR NEEDS TO DO TO TESTIFY, HE OUGHT AMBASSADOR NEEDS TO DO TO TESTIFY, HE OUGHT 20 DO THIS. TO TESTIFY, HE OUGHT 20 DO THIS.>>Reporter: 20 DO THIS.>>Reporter: REPUBLICANS DEFENDING>>Reporter: REPUBLICANS DEFENDING THE PRESIDENT WHO IS REPUBLICANS DEFENDING THE PRESIDENT WHO IS TWEETING UNFORTUNATELY THE PRESIDENT WHO IS TWEETING UNFORTUNATELY SONDLAND WOULD BE TWEETING UNFORTUNATELY SONDLAND WOULD BE TESTIFYING BEFORE A SONDLAND WOULD BE TESTIFYING BEFORE A TOTALLY COMPROMISED TESTIFYING BEFORE A TOTALLY COMPROMISED KANGAROO COURT. TOTALLY COMPROMISED KANGAROO COURT.>>WHAT WE SEE IN THIS KANGAROO COURT.>>WHAT WE SEE IN THIS IMPEACHMENT IS A>>WHAT WE SEE IN THIS IMPEACHMENT IS A KANGAROO COURT IMPEACHMENT IS A KANGAROO COURT THINKING ENTIRE THING KANGAROO COURT THINKING ENTIRE THING IS A POLITICAL THINKING ENTIRE THING IS A POLITICAL CHARADE. IS A POLITICAL CHARADE.>>Reporter: A CHARADE.>>Reporter: A CONGRESSIONAL SOURCE>>Reporter: A CONGRESSIONAL SOURCE WITH KNOWLEDGE OF THE CONGRESSIONAL SOURCE WITH KNOWLEDGE OF THE MATTER TELLS NBC NEWS WITH KNOWLEDGE OF THE MATTER TELLS NBC NEWS THE WHISTLE-BLOWER IN MATTER TELLS NBC NEWS THE WHISTLE-BLOWER IN A MEMO SAYS A WHITE THE WHISTLE-BLOWER IN A MEMO SAYS A WHITE HOUSE OFFICIAL WHO A MEMO SAYS A WHITE HOUSE OFFICIAL WHO LISTENED TO PRESIDENT HOUSE OFFICIAL WHO LISTENED TO PRESIDENT TRUMP’S JULY PHONE LISTENED TO PRESIDENT TRUMP’S JULY PHONE CALL WITH UKRAINE’S TRUMP’S JULY PHONE CALL WITH UKRAINE’S LEADER DESCRIBED IT AS CALL WITH UKRAINE’S LEADER DESCRIBED IT AS CRAZY AND FRIGHTENING. LEADER DESCRIBED IT AS CRAZY AND FRIGHTENING. BOTH SIDES FIRMLY CRAZY AND FRIGHTENING. BOTH SIDES FIRMLY ENTRENCHED WITH BOTH SIDES FIRMLY ENTRENCHED WITH FRUSTRATION SPILLING ENTRENCHED WITH FRUSTRATION SPILLING OVER. FRUSTRATION SPILLING OVER.>>EVERYTHING IS A OVER.>>EVERYTHING IS A CLOWN SHOW, AND>>EVERYTHING IS A CLOWN SHOW, AND EVERYBODY IN THIS CLOWN SHOW, AND EVERYBODY IN THIS PROCESS IS LOSING EVERYBODY IN THIS PROCESS IS LOSING CREDIBILITY. PROCESS IS LOSING CREDIBILITY.>>AND TONIGHT OUR NEW CREDIBILITY.>>AND TONIGHT OUR NEW NBC NEWS/WALL STREET>>AND TONIGHT OUR NEW NBC NEWS/WALL STREET JOURNAL POLL SHOWS NBC NEWS/WALL STREET JOURNAL POLL SHOWS AMERICANS ARE DIVIDED JOURNAL POLL SHOWS AMERICANS ARE DIVIDED MOSTLY ALONG PARTY