Impeachment's hectic fourth week ends. Here's what to look for next week.

2020 Vision: Hillary Clinton thinks Russia will back Tulsi Gabbard to help Trump stay in power

Republican leader struggles to defend Mulvaney quid pro quo press conference remarks

At tense congressional hearing, Democrats argue for expanding the Voting Rights Act

PHOTOS: Protests paralyze Catalonia as marches head for Barcelona

Trump is failing as commander in chief, retired Special Ops chief says

Excluded from the debates, Bullock plots an increasingly unlikely path to the White House

Pentagon expert could reveal key details in Ukraine probe

Trump actions look 'clearly' impeachable, says leading conservative legal figure

Romney speculates Turkey called Trump's bluff: 'Are we so weak and inept?'

'Climate change will not be on the agenda' of next G-7, White House says

White House confirms it tied Ukraine aid to help in pursuing conspiracy theory on DNC hack

White House selects 'perfect' location for G-7 meeting: Trump National Doral in Miami

PHOTOS: Elijah Cummings’ political timeline of the Civil rights champion

Polls show Americans have come to support Trump's impeachment much faster than Nixon's or Clinton’s

‘Rest in power’: Tributes pour in for Elijah Cummings, who died at 68

PHOTOS: New book documents 51 days of Cuban asylum seekers' journey to reach the U.S.

Pelosi describes Trump's 'very serious meltdown' during White House meeting on Syria

Republicans infuriated by Schiff's secrecy

Trump repeats debunked Ukraine conspiracy theory in Oval Office

Trump on Turkey invading Syria: It's not our problem

After the debate, who's up, who's down in the Democratic primary?

Turkey's president Erdogan bluffed Trump out of Syria. Now what does he want?

Warren, now perceived as the front-runner, takes hits from the pack

5 key takeaways from the Democratic debate in Ohio

Buttigieg, O'Rourke clash over assault-rifle buyback plan

Yang and O'Rourke propose decriminalizing opioids, including heroin

Tulsi Gabbard clashes with Democratic rivals over 'Syrian regime change war'

At debate, Biden defends his son — and himself — over Trump's Ukraine claims

Rivals put Warren on spot over taxes and health care

No debate about it: Dem candidates agree on impeachment inquiry

Rudy Giuliani refuses to comply with House Democrats' subpoena

The key figures in the impeachment inquiry, and what they are saying to investigators

What's at stake for each of the 12 Democrats in Tuesday's debate

'Five Eyes' in the dark: Will Trump and Barr destroy trust in U.S. intelligence?

Biden hopes to escape the shadow of Obama's immigration policies

'Kanye West should not be president': Chris Hayes grapples with the demise of parties

Democrats don't plan to attack Biden over son's business during October debate

Trump says sanctions coming 'soon' on Turkish officials

PHOTOS: Typhoon Hagibis leaves dozens dead in Japan

'Gaetz-crasher': Here's why a Republican lawmaker was barred from closed-door testimony

2020 Vision Monday: Polls show a 17-point swing toward impeaching Trump, which could drag down his reelection bid

VÍDEO | Agresión a una mujer "españolista" durante las protestas por la sentencia del procés

White House: Trump ‘strongly condemns’ parody video of him shooting critics and media outlets in church

Democrats don't plan to attack Biden over son's business during October debate

Judges rule against Trump in three cases on executive powers

Trump’s stonewalling could speed up impeachment

Trump critic Shepard Smith leaving Fox News

Pullback in Syria could prolong war 'two or three decades,' former top diplomat says

A history of selling out the Kurds, people with 'no friends but the mountains'

2020 Vision: Here are the dates and locations of next year's presidential debates

PHOTOS: California wildfires threaten homes in Los Angeles

Latinx Heritage Month: ‘You’re not smart enough to go to college’: How first-generation Latinx students are overcoming the odds in pursuit of higher education

Sondland will defy State Department order not to testify in impeachment probe, lawyer says

PHOTOS: In monochrome — Venezuelan fishermen among oil ruins

Campgrounds in national parks set to be privatized in new Trump plan

Pentagon officials deemed withholding of aid to Ukraine was illegal

Trump rails against impeachment inquiry as his supporters see a ‘coup’

Why evangelicals oppose Trump over Syria

2020 Vision Thursday: Trump takes the fight to blue state Minnesota. If he can win there, he's probably unbeatable — but that's a big if.