GOP senators "are not voting on constitutionality or precedent," but on "Border Security & the Wall," Trump tweets.
Sen. Rand Paul, R-Ky., announced he would support a measure to terminate Trump's national emergency declaration, joining three of his Republican colleagues.
Lawmakers are proposing a massive overhaul to the student debt system, in which borrowers' monthly bills would be automatically deducted from their paychecks.
In a statement, Alexander said, "it is time for someone else to have that privilege" of representing Tennessee in the Senate.
The agreement between President Donald Trump and President Xi Jinping reached at the G-20 summit to prevent the flow of illegal fentanyl from China to the United States has been greeted with cautious optimism by lawmakers and experts.
Senate Republicans want to vote on the U.S.-Mexico-Canada trade agreement in the lame-duck session of Congress. But they need President Trump to finalize the deal.
European Commission President Jean-Claude Juncker will have the “full backing” of the European Union as he works out a reasonable trade deal with President Donald Trump, former British Prime Minister Tony Blair told CNBC.
In June, Trump threatened to slap a 20 percent tariff on imports from members of the European Union if that bloc's trade barriers are "not soon broken down and removed."
Numerous Republican lawmakers have criticized the mounting tensions with global trading partners, but leaders have not gotten behind a bill to limit President Donald Trump's ability to impose tariffs.
Some free trade Republican lawmakers are trying to curb Trump's ability to put tariffs on U.S. allies.
Sarah Huckabee Sanders told reporters that all of President Trump's talk of a massive, trillion-dollar upgrade to America's infrastructure won't produce "a specific piece of legislation" in 2018.
Collins borrowed from the kindergarten classroom playbook and came up with the strategy of using a "talking stick," Vox reports.
The Republican-controlled Congress faces a January 19 deadline to keep the government open.
Lawmakers hope to approve a must-pass spending bill on Thursday as the clock ticks toward potential government shutdown this weekend.
Sens. Susan Collins and Lamar Alexander abandoned efforts to force a year-end budget bill to restore federal payments to insurers.
In 2012, business leaders warned against the looming debt disaster. Now, with corporate tax cuts on the table, those concerns have been put aside.
CNBC Editor at Large John Harwood sits down with Senator Lamar Alexander (R-Tenn.) to talk about tax cuts, entitlement reforms and deficits.
John Harwood, CNBC Chief Washington Correspondent, talks to Tennessee Senator Lamar Alexander about whether he believes President Donald Trump is dangerous for the country.
John Harwood, CNBC Chief Washington Correspondent, talks to Tennessee Senator Lamar Alexander about President Donald Trump's immigration policy.
John Harwood, CNBC Chief Washington Correspondent, talks to Tennessee Senator Lamar Alexander about the Senate candidacy of Alabama's Roy Moore, who's been accused of sexual misconduct by several women.