Tax reform talks at the capitol

(CBS) -- The Trump administration is pushing ahead trying to reform the nation's tax system for the first time in three decades.

On Tuesday, the president's Treasury Secretary and top economic advisor met with Senate Majority Leader Mitch McConnell and GOP members of the budget committee.

Republicans are still writing the bill so the details are thin, but they say their goals are clear.

"Keeping jobs in this country, keeping our companies competitive in the global market place and making our tax code much simpler than it is today," said Senator John Thune (R-SD).

President Trump is also working to sell his tax bill. This evening, he plans to host a bipartisan group of senators for dinner at the White House.

"I think it's to start that conversation, start talking about things we all agree on," said White House Press Secretary Sarah Sanders.

The guest list includes Republicans John Thune, Pat Toomey and Orrin Hatch of Utah. Democratic Senators Heidi Heitkamp, Joe Manchin, and Joe Donnelly will also attend.

"Well if we have the right plan that really grows the economy and helps America, everybody should be interested in that," said Senator Manchin (D-WV).

All three Democrats face re-election next year, representing states President Trump easily carried during the last election, making them the most likely to work with the president on his agenda.