Senators from both parties drilled into Ross over the tariffs on metals and separate duties targeting Chinese imports.
Democrats who face re-election in states Trump won in 2016 face pressure to support measures seen as bipartisan.
Sen. Al Franken plans an announcement Thursday after new allegations and growing calls for his resignation.
A Senate showdown is at hand over President Donald Trump's Supreme Court nominee, and it could change the Senate and the court for years to come.
Gorsuch will almost certainly be confirmed one way or another, it's just a question of how, NBC News reports.
The top U.S. Senate Democrat pledged to try to block the confirmation of President Donald Trump's Supreme Court nominee Neil Gorsuch.
Republicans won key Senate races as Democrats have only been able to flip two seats in Illinois and New Hampshire.