White House stonewalling? Democrats overreaching? Supreme Court justices may be asked to decide

President Donald Trump says his impeachment battle with House Democrats "probably ends up being a big Supreme Court case."

If so, it may not be alone.

Several other legal disputes over Trump's personal, professional and political dealings, both as president and before taking office, are headed toward the nation's highest court just as the 2020 presidential campaign is heating up. Subpoenas are flying in search of key documents and elusive testimony.

The president thinks the conservative-leaning court will be on his side. His opponents believe they have stronger constitutional arguments....