Paul Ryan

The U.S. has relied on legislation from 2001 to justify its use of force against ISIS. But a bipartisan group of representatives say it's outdated, and argue it's time for a debate.

Congress must act by Friday to avoid a partial government shutdown on Donald Trump's 100th day in office. That could be complicated as the White House pushes a border wall, health care and taxes.

There is backbiting and infighting in the Trump White House that's playing out like a season of House of Cards or Veep. But the president is facing real and difficult challenges at home and abroad.

The president told a bipartisan group of senators that there will be a deal on health care. "It's such an easy one," he said, adding that it will "happen very quickly." But it's hardly that easy.

The president showed little interest in policy details. If he continues to focus superficially on getting a win instead of learning, Republicans warn that his priorities will continue to be derailed.

The bill faced opposition from the center and right within the party. And Trump, for all his efforts at deal-making, hasn't been able yet to secure the votes.

The GOP deadline to pass health care is the first week of April. If it doesn't happen, everything else gets pushed back. Trump's agenda faces two big tests this week, from the Supreme Court to Russia.

Republicans say they will replace Obamacare using a methodical, step-by-step legislative approach combined with executive actions from the next Health and Human Services secretary.