Hello from CNN. I'm Chris De Beow with the five things you need to know for

Tuesday, September 12th. Today I am directing our House Committee to open a

formal impeachment inquiry into President Joe Biden.

That was House Speaker Kevin McCarthy speaking this morning, saying the

GOP has uncovered what he called a quote, culture of corruption while they've been on summer recess.

He claims Biden was improperly involved in his son's foreign business dealings, but

so far Republicans haven't presented any evidence to back that up.

The move comes amid increasing pressure from haven't presented any evidence to back that up.

The move comes amid increasing pressure

from McCarthy's right flank to move ahead with an impeachment,

despite resistance from some moderates.

McCarthy didn't mention a vote, though,

and sources say he won't put anything on the floor

until he knows what support he has. McCarthy's juggling this and a looming deadline to get a

spending bill through the House and avoid a government shutdown before the end of the month.

Today starts what legal experts are calling the country's biggest monopoly case in decades.

Google is facing off in court against the federal government, where its

search engine, the core of its business that brings in billions of dollars in

revenue, is being challenged.

CNN's Brian Fung is in the courthouse watching this hearing very closely.

So Brian, what's the government's argument here?

So Krista, US prosecutors say Google has allegedly abused its dominance in the online

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