Trump's first wall to overcome: Congress The president is plotting an aggressive agenda — but lawmakers struggle to do anything quickly.

PHILADELPHIA — President Donald Trump ordered Senate and House Republicans here to get to work: new trade deals, new construction projects, an Obamacare repeal and replacement, filling a Cabinet and a Supreme Court seat and reforming the tax code.

But the business mogul-turned-president is getting a reality check from Congress, which can't just wave through his agenda. Each piece of legislation Trump wants to pass will be a major lift on Capitol Hill — and much of it will spark fierce Democratic resistance — meaning it will take weeks or months of negotiation to come together.

 “It’s a new world when you have 535 people on your board of directors,” said Rep. Jason Chaffetz (R-Utah) in an interview. “Donald Trump is a man of action. He wants things done and done yesterday. We like that about him, but Congress was not set up to act like that.”

 Some of Trump's proposals, including his infrastructure pitch, aren't even priorities for Republicans. Instead, they're targeting health care and taxes atop their agenda, both monumental tasks that could easily exhaust much of the GOP's political capital. And the GOP congressional retreat here in Philadelphia — intended to help smooth over differences and speed things along — produced little progress on any of those big ticket items.

On Wednesday Trump tasked lawmakers with running “the busiest Congress we’ve had in decades, maybe ever.”“Now we have to deliver,” he told lawmakers. "Enough all-talk, no-action…. This is our chance to achieve great and lasting change for our beloved nation."