Senate Minority Leader Chuck Schumer in central New York on Thursday said he has urged Democrats in the U.S. Senate to “keep our powder dry” as impeachment talk swirls in Washington around President Donald Trump.

The New York Democrat said he supports a “fact-based” and “non-rhetorical” inquiry into the efforts of the president to have the president of Ukraine investigate the business dealings of Democratic presidential candidate Joe Biden’s son Hunter in the country.

“The founding fathers — Jefferson, Madison, Washington — were most worried about foreign interference. So to have a thorough, fact-based, non-rhetorical investigation as to what happened is very called for,” Schumer said. “I’ve told my senators that they should keep our powder dry, that we should not come to conclusions, that we should listen to the facts and then we will all have to make decisions.”

The Senate would consider any articles of impeachment voted on and approved the House of Representatives in an impeachment trial.

Schumer held the unusual distinction of voting twice on a presidential impeachment in 1998 and 1999, when he served out his term in the House and took a U.S. Senate seat in 1999. In both instances, he voted to acquit President Bill Clinton.