WASHINGTON — Brett Kavanaugh begins his Senate confirmation hearings to the Supreme Court on Tuesday, with Democrats vowing a grilling that produces “sparks.”

Democrats on the Senate Judiciary Committee intend to make the case that Kavanaugh would overturn abortion rights, scuttle Robert Mueller’s investigation of Russian meddling in US elections, limit gun control and weaken ObamaCare.

Several potential 2020 presidential candidates — Sens. Cory Booker (D-N.J.), Kamala Harris (D-Calif.) and Amy Klobuchar (D-Minn.) — are sure to make the most of their chance to question Kavanaugh on national TV.

“There will be sparks at this hearing,” Sen. Richard Blumenthal (D-Conn.) told reporters last week.

Kavanaugh, however, has math on his side.

Once Arizona Gov. Doug Ducey appoints a successor to Sen. John McCain, the GOP will hold a 51-49 majority in the Senate. In the event of a 50-50 tie, Vice President Mike Pence would cast the deciding vote for Kavanaugh.

Sen. Lindsey Graham (R-S.C.) predicted Sunday Kavanaugh would convince red-state Democrats facing re-election in November to come on board.

“If he does well at the hearing, he will get, my belief is 55 (votes) or higher,” Graham told “Fox News Sunday.”

Already with strong GOP support, Kavanaugh’s goal is to avoid making news. Like past nominees, he’s expected to dodge specific questions on how he’d rule on potential cases like abortion, gun control and campaign finance.

“They (senators) know very well that judges cannot answer questions about cases that are likely to come before them,” Carrie Severino, policy director of the Judicial Crisis Network, told “Fox and Friends” on Monday. The conservative group has poured millions into TV ads supporting Kavanaugh.

“The 2020 contenders are going to want to get more and more tape of him saying, ‘Sorry, I can’t answer that.’ They are looking to film campaign videos, they are not really actually trying to get information.”

If Kavanaugh earns confirmation, he’ll replace swing-vote Justice Anthony Kennedy and cement the court’s 5-4 conservative majority. Liberal activists are outraged and have suggested Democrats just walk out of the “sham” hearings.

Democrats have raised red flags over several of Kavanaugh’s previous writings, like his belief that sitting presidents should be protected from criminal investigations.

The hearings are expected to last three or four days.