There are a couple of issues,
(1) the Democrats are totally focused on obstructing Trump, regardless of what he does.
(2) Drawing attention to tariffs will likely draw too much attention to why so many tariffs serve the best interest of foreign companies rather than the American people; or serve the best interst of US companies who have outsourced their manufacturing to foreign lands; and whether that's because of collusion between elected officials or bureaucrats who may be financially benefiting from that imbalance. There are about 13,000 lobbyist in Washington, some of which represent foreign companies and some of which are there offering favors to politicians who can slant trade deals to favor their client rather than the American people.
