Tremblay said the weather conditions were good on Monday.
Trump also has blasted Sessions frequently and said last week "I don't have an attorney general."
Trump, on his first overseas trip as US president, on Thursday met with Tusk and Jean-Claude Juncker, the president of the European Commission, both of whom have been critical of Trump's remarks in the past.
Trump has lashed out at NATO members, Germany in particular, for failing to increase their national defense budget to 2 percent of their GDP, though they had promised in 2014 to achieve it in 10 years.
Trump was alleged to have abused power by using military aid that Congress approved to pressure Zelensky into investigating Biden, the leading 2020 Democratic presidential candidate in order to help his re-election campaign.
Trump tweeted that he was considering the move as the 800,000 recipients of the Deferred Action for Childhood Arrivals (DACA) program "have been totally abandoned by Democrats" and his long-promised border wall "is not fully funded."
昆明妇科检查价格
Trump on Saturday proposed extending protections for young people brought to the nation illegally as children in exchange for the .7 billion funding for his long-promised border wall, signaling a willingness to break the shutdown standoff.
Trump backed away from plans to suspend guest-worker programs after business groups erupted in anger at the threat of losing access to foreign labor, The New York Times reported.
Trump also stressed the importance of US-China social and cultural exchange, saying that he hoped the two sides would expand exchange and cooperation in various areas, according to the press release.
Trump reissued his call for Congress to pass new stimulus legislation, saying in a tweet that he was "ready to sign" a bill.